Move BenchTimer to tools as Timer

This breaks a bunch of circular dependencies between tools and gm and bench.

BUG=skia:
R=tfarina@chromium.org, mtklein@google.com

Author: mtklein@chromium.org

Review URL: https://codereview.chromium.org/344213003

39 files changed, 319 insertions, 495 deletions

diff --git a/bench/BenchSysTimer_c.cpp b/bench/BenchSysTimer_c.cpp
deleted file mode 100644
index f4cbd39d73..0000000000
--- a/bench/BenchSysTimer_c.cpp
+++ /dev/null
@@ -1,27 +0,0 @@
-
-/*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#include "BenchSysTimer_c.h"
-
-//Time
-#include <time.h>
-
-void BenchSysTimer::startWall() {
-    this->fStartWall = time();
-}
-void BenchSysTimer::startCpu() {
-    this->fStartCpu = clock();
-}
-
-double BenchSysTimer::endCpu() {
-    clock_t end_cpu = clock();
-    this->fCpu = (end_cpu - this->fStartCpu) * CLOCKS_PER_SEC / 1000.0;
-}
-double BenchSysTimer::endWall() {
-    time_t end_wall = time();
-    this->fWall = difftime(end_wall, this->fstartWall) / 1000.0;
-}
diff --git a/bench/BenchSysTimer_c.h b/bench/BenchSysTimer_c.h
deleted file mode 100644
index 586f0b4ff0..0000000000
--- a/bench/BenchSysTimer_c.h
+++ /dev/null
@@ -1,26 +0,0 @@
-
-/*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#ifndef SkBenchSysTimer_DEFINED
-#define SkBenchSysTimer_DEFINED
-
-//Time
-#include <time.h>
-
-// Beware: this timer uses standard (as opposed to high precision) clocks
-class BenchSysTimer {
-public:
-    void startWall();
-    void startCpu();
-    double endCpu();
-    double endWall();
-private:
-    clock_t start_cpu;
-    time_t fStartWall;
-};
-
-#endif
diff --git a/bench/BenchTimer.cpp b/bench/BenchTimer.cpp
deleted file mode 100644
index f3e8e3b0ec..0000000000
--- a/bench/BenchTimer.cpp
+++ /dev/null
@@ -1,94 +0,0 @@
-
-/*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-#include "BenchTimer.h"
-#if defined(SK_BUILD_FOR_WIN32)
-    #include "BenchSysTimer_windows.h"
-#elif defined(SK_BUILD_FOR_MAC)
-    #include "BenchSysTimer_mach.h"
-#elif defined(SK_BUILD_FOR_UNIX) || defined(SK_BUILD_FOR_ANDROID)
-    #include "BenchSysTimer_posix.h"
-#else
-    #include "BenchSysTimer_c.h"
-#endif
-
-#if SK_SUPPORT_GPU
-#include "BenchGpuTimer_gl.h"
-#endif
-
-BenchTimer::BenchTimer(SkGLContextHelper* gl)
-        : fCpu(-1.0)
-        , fWall(-1.0)
-        , fTruncatedCpu(-1.0)
-        , fTruncatedWall(-1.0)
-        , fGpu(-1.0)
-{
-    fSysTimer = new BenchSysTimer();
-    fTruncatedSysTimer = new BenchSysTimer();
-#if SK_SUPPORT_GPU
-    if (gl) {
-        fGpuTimer = new BenchGpuTimer(gl);
-    } else {
-        fGpuTimer = NULL;
-    }
-#endif
-}
-
-BenchTimer::~BenchTimer() {
-    delete fSysTimer;
-    delete fTruncatedSysTimer;
-#if SK_SUPPORT_GPU
-    delete fGpuTimer;
-#endif
-}
-
-void BenchTimer::start(double durationScale) {
-    fDurationScale = durationScale;
-
-    fSysTimer->startWall();
-    fTruncatedSysTimer->startWall();
-#if SK_SUPPORT_GPU
-    if (fGpuTimer) {
-        fGpuTimer->startGpu();
-    }
-#endif
-    fSysTimer->startCpu();
-    fTruncatedSysTimer->startCpu();
-}
-
-void BenchTimer::end() {
-    fCpu = fSysTimer->endCpu() * fDurationScale;
-#if SK_SUPPORT_GPU
-    //It is important to stop the cpu clocks first,
-    //as the following will cpu wait for the gpu to finish.
-    if (fGpuTimer) {
-        fGpu = fGpuTimer->endGpu() * fDurationScale;
-    }
-#endif
-    fWall = fSysTimer->endWall() * fDurationScale;
-}
-
-void BenchTimer::truncatedEnd() {
-    fTruncatedCpu = fTruncatedSysTimer->endCpu() * fDurationScale;
-    fTruncatedWall = fTruncatedSysTimer->endWall() * fDurationScale;
-}
-
-WallTimer::WallTimer() : fWall(-1.0), fSysTimer(new BenchSysTimer) {}
-
-WallTimer::~WallTimer() {
-    delete fSysTimer;
-}
-
-void WallTimer::start(double durationScale) {
-    fDurationScale = durationScale;
-    fSysTimer->startWall();
-}
-
-void WallTimer::end() {
-    fWall = fSysTimer->endWall() * fDurationScale;
-}
-
diff --git a/bench/benchmain.cpp b/bench/benchmain.cpp
index 6b3f5872f2..5c3b7901af 100644
--- a/bench/benchmain.cpp
+++ b/bench/benchmain.cpp
@@ -6,7 +6,6 @@
  */
 
 #include "BenchLogger.h"
-#include "BenchTimer.h"
 #include "Benchmark.h"
 #include "CrashHandler.h"
 #include "GMBench.h"
@@ -24,6 +23,7 @@
 #include "SkPictureRecorder.h"
 #include "SkString.h"
 #include "SkSurface.h"
+#include "Timer.h"
 
 #if SK_SUPPORT_GPU
 #include "GrContext.h"
@@ -530,9 +530,9 @@ int tool_main(int argc, char** argv) {
             if (Benchmark::kGPU_Backend == config.backend) {
                 contextHelper = gContextFactory.getGLContext(config.contextType);
             }
-            BenchTimer timer(contextHelper);
+            Timer timer(contextHelper);
 #else
-            BenchTimer timer;
+            Timer timer;
 #endif
 
             double previous = std::numeric_limits<double>::infinity();
diff --git a/debugger/QT/SkDebuggerGUI.cpp b/debugger/QT/SkDebuggerGUI.cpp
index 1873afca67..5cecba273c 100644
--- a/debugger/QT/SkDebuggerGUI.cpp
+++ b/debugger/QT/SkDebuggerGUI.cpp
@@ -17,13 +17,13 @@
 __SK_FORCE_IMAGE_DECODER_LINKING;
 
 #if defined(SK_BUILD_FOR_WIN32)
-    #include "BenchSysTimer_windows.h"
+    #include "SysTimer_windows.h"
 #elif defined(SK_BUILD_FOR_MAC)
-    #include "BenchSysTimer_mach.h"
+    #include "SysTimer_mach.h"
 #elif defined(SK_BUILD_FOR_UNIX) || defined(SK_BUILD_FOR_ANDROID)
-    #include "BenchSysTimer_posix.h"
+    #include "SysTimer_posix.h"
 #else
-    #include "BenchSysTimer_c.h"
+    #include "SysTimer_c.h"
 #endif
 
 
@@ -202,7 +202,7 @@ public:
     double totTime() const { return fTot; }
 
 protected:
-    BenchSysTimer fTimer;
+    SysTimer fTimer;
     SkTDArray<bool> fSkipCommands; // has the command been deleted in the GUI?
     SkTDArray<double> fTimes;   // sum of time consumed for each command
     SkTDArray<double> fTypeTimes; // sum of time consumed for each type of command (e.g., drawPath)
diff --git a/gyp/SampleApp.gyp b/gyp/SampleApp.gyp
index abfc8b77f9..9ced81b98f 100644
--- a/gyp/SampleApp.gyp
+++ b/gyp/SampleApp.gyp
@@ -150,8 +150,8 @@
         'flags.gyp:flags',
         'lua.gyp:lua',
         'pdf.gyp:pdf',
-        'resources.gyp:resources',
         'skia_lib.gyp:skia_lib',
+        'tools.gyp:resources',
         'views.gyp:views',
         'views_animated.gyp:views_animated',
         'xml.gyp:xml',
diff --git a/gyp/apptype_console.gypi b/gyp/apptype_console.gypi
index cde87792c7..b9939987b8 100644
--- a/gyp/apptype_console.gypi
+++ b/gyp/apptype_console.gypi
@@ -15,7 +15,7 @@
       [ 'skia_os == "android" and not skia_android_framework', {
         'dependencies': [
           'android_deps.gyp:Android_EntryPoint',
-          'android_system.gyp:skia_launcher',
+          'skia_launcher.gyp:skia_launcher',
         ],
       }],
       [ 'skia_os == "nacl"', {
diff --git a/gyp/bench.gyp b/gyp/bench.gyp
index 15927e6413..1c1943705f 100644
--- a/gyp/bench.gyp
+++ b/gyp/bench.gyp
@@ -9,13 +9,13 @@
       'target_name': 'bench',
       'type': 'executable',
       'dependencies': [
-        'bench_timer',
-        'crash_handler.gyp:CrashHandler',
         'etc1.gyp:libetc1',
         'flags.gyp:flags',
         'jsoncpp.gyp:jsoncpp',
-        'resources.gyp:resources',
         'skia_lib.gyp:skia_lib',
+        'tools.gyp:crash_handler',
+        'tools.gyp:resources',
+        'tools.gyp:timer',
       ],
       'sources': [
         '../bench/BenchLogger.cpp',
@@ -50,63 +50,5 @@
         'gmslides.gypi',
       ],
     },
-    {
-      'target_name' : 'bench_timer',
-      'type': 'static_library',
-      'sources': [
-        '../bench/BenchTimer.h',
-        '../bench/BenchTimer.cpp',
-        '../bench/BenchSysTimer_mach.h',
-        '../bench/BenchSysTimer_mach.cpp',
-        '../bench/BenchSysTimer_posix.h',
-        '../bench/BenchSysTimer_posix.cpp',
-        '../bench/BenchSysTimer_windows.h',
-        '../bench/BenchSysTimer_windows.cpp',
-      ],
-      'include_dirs': [
-        '../src/core',
-        '../src/gpu',
-        '../tools',
-      ],
-      'direct_dependent_settings': {
-        'include_dirs': ['../bench'],
-      },
-      'dependencies': [
-        'skia_lib.gyp:skia_lib',
-      ],
-      'conditions': [
-        [ 'skia_os not in ["mac", "ios"]', {
-          'sources!': [
-            '../bench/BenchSysTimer_mach.h',
-            '../bench/BenchSysTimer_mach.cpp',
-          ],
-        }],
-        [ 'skia_os not in ["linux", "freebsd", "openbsd", "solaris", "android", "chromeos"]', {
-          'sources!': [
-            '../bench/BenchSysTimer_posix.h',
-            '../bench/BenchSysTimer_posix.cpp',
-          ],
-        }],
-        [ 'skia_os in ["linux", "freebsd", "openbsd", "solaris", "chromeos"]', {
-          'link_settings': {
-            'libraries': [
-              '-lrt',
-            ],
-          },
-        }],
-        [ 'skia_os != "win"', {
-          'sources!': [
-            '../bench/BenchSysTimer_windows.h',
-            '../bench/BenchSysTimer_windows.cpp',
-          ],
-        }],
-        ['skia_gpu == 1', {
-          'sources': [
-            '../bench/BenchGpuTimer_gl.h',
-            '../bench/BenchGpuTimer_gl.cpp',
-          ],
-        }],
-      ],
-    }
   ],
 }
diff --git a/gyp/crash_handler.gyp b/gyp/crash_handler.gyp
deleted file mode 100644
index 7e3599c8d9..0000000000
--- a/gyp/crash_handler.gyp
+++ /dev/null
@@ -1,18 +0,0 @@
-{
-  'targets': [{
-      'target_name': 'CrashHandler',
-          'type': 'static_library',
-          'sources': [ '../tools/CrashHandler.cpp' ],
-          'dependencies': [ 'skia_lib.gyp:skia_lib' ],
-          'direct_dependent_settings': {
-              'include_dirs': [ '../tools' ],
-          },
-          'all_dependent_settings': {
-              'msvs_settings': {
-                  'VCLinkerTool': {
-                      'AdditionalDependencies': [ 'Dbghelp.lib' ],
-                  }
-              },
-          }
-  }]
-}
diff --git a/gyp/debugger.gyp b/gyp/debugger.gyp
index 84f03972df..4add7439a8 100644
--- a/gyp/debugger.gyp
+++ b/gyp/debugger.gyp
@@ -96,8 +96,8 @@
       ],
       'dependencies': [
         'skia_lib.gyp:skia_lib',
-        'bench.gyp:bench_timer',
         'tools.gyp:picture_renderer',
+        'tools.gyp:timer',
       ],
       'conditions': [
         [ 'skia_os == "nacl"', {
diff --git a/gyp/dm.gyp b/gyp/dm.gyp
index f69ffe5f4b..2d02796b45 100644
--- a/gyp/dm.gyp
+++ b/gyp/dm.gyp
@@ -55,12 +55,12 @@
             '../src/utils/debugger/SkObjectParser.cpp',
         ],
         'dependencies': [
-            'crash_handler.gyp:CrashHandler',
             'etc1.gyp:libetc1',
             'flags.gyp:flags',
             'gputest.gyp:skgputest',
             'jsoncpp.gyp:jsoncpp',
             'skia_lib.gyp:skia_lib',
+            'tools.gyp:crash_handler',
         ],
         'conditions': [
           ['skia_android_framework', {
diff --git a/gyp/gm.gyp b/gyp/gm.gyp
index 0b0054b701..fd56e7eebe 100644
--- a/gyp/gm.gyp
+++ b/gyp/gm.gyp
@@ -5,28 +5,6 @@
   ],
   'targets': [
     {
-      'target_name': 'gm_expectations',
-      'type': 'static_library',
-      'include_dirs' : [
-        '../src/utils/',
-      ],
-      'sources': [
-        '../gm/gm_expectations.h',
-        '../gm/gm_expectations.cpp',
-        '../tools/sk_tool_utils.cpp',
-      ],
-      'dependencies': [
-        'crash_handler.gyp:CrashHandler',
-        'jsoncpp.gyp:jsoncpp',
-        'skia_lib.gyp:skia_lib',
-      ],
-      'direct_dependent_settings': {
-        'include_dirs': [
-          '../gm/',
-        ],
-      },
-    },
-    {
       'target_name': 'gm',
       'type': 'executable',
       'include_dirs' : [
@@ -49,11 +27,12 @@
       'dependencies': [
         'etc1.gyp:libetc1',
         'flags.gyp:flags',
-        'gm.gyp:gm_expectations',
         'jsoncpp.gyp:jsoncpp',
         'pdf.gyp:pdf',
-        'resources.gyp:resources',
         'skia_lib.gyp:skia_lib',
+        'tools.gyp:crash_handler',
+        'tools.gyp:gm_expectations',
+        'tools.gyp:resources',
       ],
       'conditions': [
         ['skia_android_framework', {
diff --git a/gyp/resources.gyp b/gyp/resources.gyp
deleted file mode 100644
index 48e96c3cc5..0000000000
--- a/gyp/resources.gyp
+++ /dev/null
@@ -1,25 +0,0 @@
-# Copyright 2014 Google Inc.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-{
-  'targets': [
-    {
-      'target_name': 'resources',
-      'type': 'static_library',
-      'sources': [
-        '../tools/Resources.cpp',
-        '../tools/Resources.h',
-      ],
-      'dependencies': [
-        'flags.gyp:flags',
-        'skia_lib.gyp:skia_lib',
-      ],
-      'direct_dependent_settings': {
-        'include_dirs': [
-          '../tools/',
-        ],
-      },
-    },
-  ]
-}
diff --git a/gyp/skia_launcher.gyp b/gyp/skia_launcher.gyp
new file mode 100644
index 0000000000..d9970b4290
--- /dev/null
+++ b/gyp/skia_launcher.gyp
@@ -0,0 +1,3 @@
+{
+  'includes': [ '../platform_tools/android/gyp/skia_launcher.gypi' ]
+}
diff --git a/gyp/tests.gyp b/gyp/tests.gyp
index 80768efa35..155207ed6f 100644
--- a/gyp/tests.gyp
+++ b/gyp/tests.gyp
@@ -11,7 +11,7 @@
         'pathops_unittest.gypi',
         'tests.gypi',
       ],
-      'dependencies': [ 'crash_handler.gyp:CrashHandler' ],
+      'dependencies': [ 'tools.gyp:crash_handler' ],
       'sources': [
         '../tests/skia_test.cpp',
       ],
diff --git a/gyp/tests.gypi b/gyp/tests.gypi
index 2a7dddd4ff..f135107c34 100644
--- a/gyp/tests.gypi
+++ b/gyp/tests.gypi
@@ -20,9 +20,9 @@
     'experimental.gyp:experimental',
     'flags.gyp:flags',
     'pdf.gyp:pdf',
-    'resources.gyp:resources',
     'skia_lib.gyp:skia_lib',
     'tools.gyp:picture_utils',
+    'tools.gyp:resources',
   ],
   'sources': [
     '../tests/Test.cpp',
diff --git a/gyp/tools.gyp b/gyp/tools.gyp
index 5ea127296a..eeb210a497 100644
--- a/gyp/tools.gyp
+++ b/gyp/tools.gyp
@@ -43,6 +43,86 @@
         ],
       ],
     },
+    {  # This would go in gm.gyp, but it's also used by skimage below.
+      'target_name': 'gm_expectations',
+      'type': 'static_library',
+      'include_dirs' : [ '../src/utils/' ],
+      'sources': [
+        '../gm/gm_expectations.cpp',
+        '../tools/sk_tool_utils.cpp',
+      ],
+      'dependencies': [
+        'jsoncpp.gyp:jsoncpp',
+        'skia_lib.gyp:skia_lib',
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [ '../gm/' ],
+      },
+    },
+    {
+      'target_name': 'crash_handler',
+        'type': 'static_library',
+        'sources': [ '../tools/CrashHandler.cpp' ],
+        'dependencies': [ 'skia_lib.gyp:skia_lib' ],
+        'direct_dependent_settings': {
+          'include_dirs': [ '../tools' ],
+        },
+        'all_dependent_settings': {
+          'msvs_settings': {
+            'VCLinkerTool': {
+              'AdditionalDependencies': [ 'Dbghelp.lib' ],
+            }
+          },
+        }
+    },
+    {
+      'target_name': 'resources',
+      'type': 'static_library',
+      'sources': [ '../tools/Resources.cpp' ],
+      'dependencies': [
+        'flags.gyp:flags',
+        'skia_lib.gyp:skia_lib',
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [ '../tools/', ],
+      },
+    },
+    {
+      'target_name' : 'timer',
+      'type': 'static_library',
+      'sources': [
+        '../tools/timer/Timer.cpp',
+        '../tools/timer/TimerData.cpp',
+      ],
+      'include_dirs': [
+        '../src/core',
+        '../src/gpu',
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': ['../tools/timer'],
+      },
+      'dependencies': [
+        'skia_lib.gyp:skia_lib',
+        'jsoncpp.gyp:jsoncpp',
+      ],
+      'conditions': [
+        ['skia_gpu == 1', {
+          'sources': [ '../tools/timer/GpuTimer.cpp' ],
+        }],
+        [ 'skia_os in ["mac", "ios"]', {
+          'sources': [ '../tools/timer/SysTimer_mach.cpp' ],
+        }],
+        [ 'skia_os == "win"', {
+          'sources': [ '../tools/timer/SysTimer_windows.cpp' ],
+        }],
+        [ 'skia_os in ["linux", "freebsd", "openbsd", "solaris", "android", "chromeos"]', {
+          'sources': [ '../tools/timer/SysTimer_posix.cpp' ],
+        }],
+        [ 'skia_os in ["linux", "freebsd", "openbsd", "solaris", "chromeos"]', {
+          'link_settings': { 'libraries': [ '-lrt' ] },
+        }],
+      ],
+    },
     {
       'target_name': 'skdiff',
       'type': 'executable',
@@ -178,8 +258,8 @@
         '../src/utils/',
       ],
       'dependencies': [
+        'gm_expectations',
         'flags.gyp:flags',
-        'gm.gyp:gm_expectations',
         'jsoncpp.gyp:jsoncpp',
         'skia_lib.gyp:skia_lib',
       ],
@@ -299,14 +379,13 @@
         '../src/lazy/',
       ],
       'dependencies': [
-        'bench.gyp:bench_timer',
-        'crash_handler.gyp:CrashHandler',
+        'timer',
+        'crash_handler',
         'flags.gyp:flags',
         'jsoncpp.gyp:jsoncpp',
         'skia_lib.gyp:skia_lib',
         'tools.gyp:picture_renderer',
         'tools.gyp:picture_utils',
-        'tools.gyp:timer_data',
       ],
     },
     {
@@ -322,7 +401,7 @@
         '../src/lazy',
       ],
       'dependencies': [
-        'bench.gyp:bench_timer',
+        'timer',
         'flags.gyp:flags',
         'skia_lib.gyp:skia_lib',
       ],
@@ -338,7 +417,7 @@
         '../src/images',
       ],
       'dependencies': [
-        'bench.gyp:bench_timer',
+        'timer',
         'flags.gyp:flags',
         'skia_lib.gyp:skia_lib',
       ],
@@ -357,7 +436,7 @@
         '../src/lazy',
       ],
       'dependencies': [
-        'bench.gyp:bench_timer',
+        'timer',
         'flags.gyp:flags',
         'skia_lib.gyp:skia_lib',
       ],
@@ -505,9 +584,8 @@
         # Bench code:
       ],
       'dependencies': [
-        'bench.gyp:bench_timer',
+        'timer',
         'flags.gyp:flags',
-        'tools.gyp:timer_data',
         'skia_lib.gyp:skia_lib',
         'tools.gyp:picture_renderer',
         'tools.gyp:picture_utils',
@@ -544,17 +622,6 @@
         'skia_lib.gyp:skia_lib',
       ],
     },
-    {
-      'target_name': 'timer_data',
-      'type': 'static_library',
-      'sources': [
-        '../bench/TimerData.cpp',
-      ],
-      'dependencies': [
-        'skia_lib.gyp:skia_lib',
-        'jsoncpp.gyp:jsoncpp'
-      ]
-    }
   ],
   'conditions': [
     ['skia_shared_lib',
diff --git a/platform_tools/android/gyp/skia_android.gypi b/platform_tools/android/gyp/skia_android.gypi
index 9ebee7cc6d..624b599bd6 100644
--- a/platform_tools/android/gyp/skia_android.gypi
+++ b/platform_tools/android/gyp/skia_android.gypi
@@ -45,13 +45,6 @@
       ],
     },
     {
-      'target_name': 'skia_launcher',
-      'type': 'executable',
-      'sources': [
-        '../launcher/skia_launcher.cpp',
-      ],
-    },
-    {
       'target_name': 'SampleApp_APK',
       'type': 'none',
       'dependencies': [
diff --git a/platform_tools/android/gyp/skia_launcher.gypi b/platform_tools/android/gyp/skia_launcher.gypi
new file mode 100644
index 0000000000..f8b5dfd794
--- /dev/null
+++ b/platform_tools/android/gyp/skia_launcher.gypi
@@ -0,0 +1,7 @@
+{
+    'targets': [{
+        'target_name': 'skia_launcher',
+        'type': 'executable',
+        'sources': [ '../launcher/skia_launcher.cpp' ],
+    }]
+}
diff --git a/tools/DumpRecord.cpp b/tools/DumpRecord.cpp
index 2376fb9cf0..6e679a5430 100644
--- a/tools/DumpRecord.cpp
+++ b/tools/DumpRecord.cpp
@@ -10,8 +10,8 @@
 #include "SkRecord.h"
 #include "SkRecordDraw.h"
 
-#include "BenchTimer.h"
 #include "DumpRecord.h"
+#include "Timer.h"
 
 namespace {
 
@@ -33,7 +33,7 @@ public:
 
     template <typename T>
     void operator()(const T& command) {
-        BenchTimer timer;
+        Timer timer;
         timer.start();
             fDraw(command);
         timer.end();
diff --git a/tools/PictureBenchmark.cpp b/tools/PictureBenchmark.cpp
index 30967c7381..85a49f4e5e 100644
--- a/tools/PictureBenchmark.cpp
+++ b/tools/PictureBenchmark.cpp
@@ -5,7 +5,7 @@
  * found in the LICENSE file.
  */
 
-#include "BenchTimer.h"
+#include "Timer.h"
 #include "PictureBenchmark.h"
 #include "SkCanvas.h"
 #include "SkPicture.h"
@@ -42,13 +42,13 @@ void PictureBenchmark::setTimersToShow(bool wall,
     fTimerTypes |= gpu ? TimerData::kGpu_Flag : 0;
 }
 
-BenchTimer* PictureBenchmark::setupTimer(bool useGLTimer) {
+Timer* PictureBenchmark::setupTimer(bool useGLTimer) {
 #if SK_SUPPORT_GPU
     if (useGLTimer && fRenderer != NULL && fRenderer->isUsingGpuDevice()) {
-        return SkNEW_ARGS(BenchTimer, (fRenderer->getGLContext()));
+        return SkNEW_ARGS(Timer, (fRenderer->getGLContext()));
     }
 #endif
-    return SkNEW_ARGS(BenchTimer, (NULL));
+    return SkNEW_ARGS(Timer, (NULL));
 }
 
 PictureRenderer* PictureBenchmark::setRenderer(sk_tools::PictureRenderer* renderer) {
@@ -147,11 +147,11 @@ void PictureBenchmark::run(SkPicture* pict) {
             // seems to cause problems (i.e., INVALID_OPERATIONs) on several
             // platforms. To work around this, we disable the gpu timer on the
             // long running timer.
-            SkAutoTDelete<BenchTimer> longRunningTimer(this->setupTimer());
+            SkAutoTDelete<Timer> longRunningTimer(this->setupTimer());
             TimerData longRunningTimerData(numOuterLoops);
 
             for (int outer = 0; outer < numOuterLoops; ++outer) {
-                SkAutoTDelete<BenchTimer> perTileTimer(this->setupTimer(false));
+                SkAutoTDelete<Timer> perTileTimer(this->setupTimer(false));
                 TimerData perTileTimerData(numInnerLoops);
 
                 longRunningTimer->start();
@@ -201,11 +201,11 @@ void PictureBenchmark::run(SkPicture* pict) {
                 numInnerLoops);
         }
     } else {
-        SkAutoTDelete<BenchTimer> longRunningTimer(this->setupTimer());
+        SkAutoTDelete<Timer> longRunningTimer(this->setupTimer());
         TimerData longRunningTimerData(numOuterLoops);
 
         for (int outer = 0; outer < numOuterLoops; ++outer) {
-            SkAutoTDelete<BenchTimer> perRunTimer(this->setupTimer(false));
+            SkAutoTDelete<Timer> perRunTimer(this->setupTimer(false));
             TimerData perRunTimerData(numInnerLoops);
 
             longRunningTimer->start();
diff --git a/tools/PictureBenchmark.h b/tools/PictureBenchmark.h
index 142d52685e..1ddd18ea16 100644
--- a/tools/PictureBenchmark.h
+++ b/tools/PictureBenchmark.h
@@ -13,8 +13,8 @@
 #include "SkTypes.h"
 #include "TimerData.h"
 
-class BenchTimer;
 class SkPicture;
+class Timer;
 
 namespace sk_tools {
 
@@ -67,7 +67,7 @@ private:
 
     PictureResultsWriter* fWriter;
 
-    BenchTimer* setupTimer(bool useGLTimer = true);
+    Timer* setupTimer(bool useGLTimer = true);
 };
 
 }
diff --git a/tools/bbh_shootout.cpp b/tools/bbh_shootout.cpp
index e657917aad..64fc6d87d8 100644
--- a/tools/bbh_shootout.cpp
+++ b/tools/bbh_shootout.cpp
@@ -5,7 +5,7 @@
  * found in the LICENSE file.
  */
 
-#include "BenchTimer.h"
+#include "Timer.h"
 #include "Benchmark.h"
 #include "LazyDecodeBitmap.h"
 #include "PictureBenchmark.h"
@@ -64,7 +64,7 @@ static void do_benchmark_work(sk_tools::PictureRenderer* renderer,
         BBoxType bBoxType,
         SkPicture* pic,
         const int numRepeats,
-        BenchTimer* timer) {
+        Timer* timer) {
     renderer->setBBoxHierarchyType(bBoxType);
     renderer->setGridSize(FLAGS_tilesize, FLAGS_tilesize);
     renderer->init(pic, NULL, NULL, NULL, false);
@@ -106,14 +106,14 @@ int tool_main(int argc, char** argv) {
             if (!includeBBoxType[bBoxType]) { continue; }
             if (FLAGS_playback > 0) {
                 sk_tools::TiledPictureRenderer playbackRenderer;
-                BenchTimer playbackTimer;
+                Timer playbackTimer;
                 do_benchmark_work(&playbackRenderer, (BBoxType)bBoxType,
                                   picture, FLAGS_playback, &playbackTimer);
                 measurement.fPlaybackAverage[bBoxType] = playbackTimer.fCpu;
             }
             if (FLAGS_record > 0) {
                 sk_tools::RecordPictureRenderer recordRenderer;
-                BenchTimer recordTimer;
+                Timer recordTimer;
                 do_benchmark_work(&recordRenderer, (BBoxType)bBoxType,
                                   picture, FLAGS_record, &recordTimer);
                 measurement.fRecordAverage[bBoxType] = recordTimer.fCpu;
diff --git a/tools/bench_pictures_main.cpp b/tools/bench_pictures_main.cpp
index d9b767b2aa..503269af6a 100644
--- a/tools/bench_pictures_main.cpp
+++ b/tools/bench_pictures_main.cpp
@@ -6,7 +6,7 @@
  */
 
 #include "BenchLogger.h"
-#include "BenchTimer.h"
+#include "Timer.h"
 #include "CopyTilesRenderer.h"
 #include "CrashHandler.h"
 #include "LazyDecodeBitmap.h"
diff --git a/tools/bench_playback.cpp b/tools/bench_playback.cpp
index 26fa1c7ee8..6ebe19d36f 100644
--- a/tools/bench_playback.cpp
+++ b/tools/bench_playback.cpp
@@ -16,10 +16,8 @@
 
 #include "../include/record/SkRecording.h"
 
-#include "BenchTimer.h"
 #include "Stats.h"
-
-typedef WallTimer Timer;
+#include "Timer.h"
 
 __SK_FORCE_IMAGE_DECODER_LINKING;
 
@@ -78,15 +76,16 @@ static void bench(SkPMColor* scratch, SkPicture& src, const char* name) {
     // Draw once to warm any caches.  The first sample otherwise can be very noisy.
     draw(*record, *picture, canvas.get());
 
-    Timer timer;
+    WallTimer timer;
+    const double scale = timescale();
     SkAutoTMalloc<double> samples(FLAGS_samples);
     for (int i = 0; i < FLAGS_samples; i++) {
         // We assume timer overhead (typically, ~30ns) is insignificant
         // compared to draw runtime (at least ~100us, usually several ms).
-        timer.start(timescale());
+        timer.start();
         draw(*record, *picture, canvas.get());
         timer.end();
-        samples[i] = timer.fWall;
+        samples[i] = timer.fWall * scale;
     }
 
     Stats stats(samples.get(), FLAGS_samples);
diff --git a/tools/bench_record.cpp b/tools/bench_record.cpp
index 0024c2ccdb..545731900b 100644
--- a/tools/bench_record.cpp
+++ b/tools/bench_record.cpp
@@ -14,11 +14,9 @@
 #include "SkStream.h"
 #include "SkString.h"
 
-#include "BenchTimer.h"
 #include "LazyDecodeBitmap.h"
 #include "Stats.h"
-
-typedef WallTimer Timer;
+#include "Timer.h"
 
 __SK_FORCE_IMAGE_DECODER_LINKING;
 
@@ -81,12 +79,13 @@ static void bench_record(const SkPicture& src,
     rerecord(src, bbhFactory);
 
     // Rerecord once to see how many times we should loop to make timer overhead insignificant.
-    Timer timer;
+    WallTimer timer;
+    const double scale = timescale();
     do {
-        timer.start(timescale());
+        timer.start();
         rerecord(src, bbhFactory);
         timer.end();
-    } while (timer.fWall < timerOverhead);   // Loop just in case something bizarre happens.
+    } while (timer.fWall * scale < timerOverhead);  // Loop just in case something bizarre happens.
 
     // We want (timer overhead / measurement) to be less than FLAGS_overheadGoal.
     // So in each sample, we'll loop enough times to have made that true for our first measurement.
@@ -94,12 +93,12 @@ static void bench_record(const SkPicture& src,
 
     SkAutoTMalloc<double> samples(FLAGS_samples);
     for (int i = 0; i < FLAGS_samples; i++) {
-        timer.start(timescale());
+        timer.start();
         for (int j = 0; j < loops; j++) {
             rerecord(src, bbhFactory);
         }
         timer.end();
-        samples[i] = timer.fWall / loops;
+        samples[i] = timer.fWall * scale / loops;
     }
 
     Stats stats(samples.get(), FLAGS_samples);
@@ -132,12 +131,13 @@ int tool_main(int argc, char** argv) {
 
     // Each run will use this timer overhead estimate to guess how many times it should run.
     static const int kOverheadLoops = 10000000;
-    Timer timer;
+    WallTimer timer;
     double overheadEstimate = 0.0;
+    const double scale = timescale();
     for (int i = 0; i < kOverheadLoops; i++) {
-        timer.start(timescale());
+        timer.start();
         timer.end();
-        overheadEstimate += timer.fWall;
+        overheadEstimate += timer.fWall * scale;
     }
     overheadEstimate /= kOverheadLoops;
 
diff --git a/tools/skpdiff/skpdiff_util.cpp b/tools/skpdiff/skpdiff_util.cpp
index 171721c3be..983bee20b3 100644
--- a/tools/skpdiff/skpdiff_util.cpp
+++ b/tools/skpdiff/skpdiff_util.cpp
@@ -83,7 +83,7 @@ const char* cl_error_to_string(cl_int err) {
 }
 #endif
 
-// TODO refactor BenchTimer to be used here
+// TODO refactor Timer to be used here
 double get_seconds() {
 #if SK_BUILD_FOR_WIN32
     LARGE_INTEGER currentTime;
diff --git a/bench/BenchGpuTimer_gl.cpp b/tools/timer/GpuTimer.cpp
index 349fc1529d..3174449f78 100644
--- a/bench/BenchGpuTimer_gl.cpp
+++ b/tools/timer/GpuTimer.cpp
@@ -5,11 +5,11 @@
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-#include "BenchGpuTimer_gl.h"
+#include "GpuTimer.h"
 #include "gl/SkGLContextHelper.h"
 #include "gl/GrGLUtil.h"
 
-BenchGpuTimer::BenchGpuTimer(const SkGLContextHelper* glctx) {
+GpuTimer::GpuTimer(const SkGLContextHelper* glctx) {
     fContext = glctx;
     glctx->ref();
     glctx->makeCurrent();
@@ -23,7 +23,7 @@ BenchGpuTimer::BenchGpuTimer(const SkGLContextHelper* glctx) {
     }
 }
 
-BenchGpuTimer::~BenchGpuTimer() {
+GpuTimer::~GpuTimer() {
     if (fSupported) {
         fContext->makeCurrent();
         SK_GL(*fContext, DeleteQueries(1, &fQuery));
@@ -31,7 +31,7 @@ BenchGpuTimer::~BenchGpuTimer() {
     fContext->unref();
 }
 
-void BenchGpuTimer::startGpu() {
+void GpuTimer::start() {
     if (fSupported) {
         fContext->makeCurrent();
         fStarted = true;
@@ -43,7 +43,7 @@ void BenchGpuTimer::startGpu() {
  * It is important to stop the cpu clocks first,
  * as this will cpu wait for the gpu to finish.
  */
-double BenchGpuTimer::endGpu() {
+double GpuTimer::end() {
     if (fSupported) {
         fStarted = false;
         fContext->makeCurrent();
@@ -52,8 +52,8 @@ double BenchGpuTimer::endGpu() {
         GrGLint available = 0;
         while (!available) {
             SK_GL_NOERRCHECK(*fContext, GetQueryObjectiv(fQuery,
-                                             GR_GL_QUERY_RESULT_AVAILABLE,
-                                             &available));
+                                                         GR_GL_QUERY_RESULT_AVAILABLE,
+                                                         &available));
             // If GetQueryObjectiv is erroring out we need some alternative
             // means of breaking out of this loop
             GrGLenum error;
diff --git a/bench/BenchGpuTimer_gl.h b/tools/timer/GpuTimer.h
index e472a4c514..2100312a21 100644
--- a/bench/BenchGpuTimer_gl.h
+++ b/tools/timer/GpuTimer.h
@@ -1,21 +1,20 @@
-
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-#ifndef SkBenchGpuTimer_DEFINED
-#define SkBenchGpuTimer_DEFINED
+#ifndef GpuTimer_DEFINED
+#define GpuTimer_DEFINED
 
 class SkGLContextHelper;
 
-class BenchGpuTimer {
+class GpuTimer {
 public:
-    BenchGpuTimer(const SkGLContextHelper* glctx);
-    ~BenchGpuTimer();
-    void startGpu();
-    double endGpu();
+    GpuTimer(const SkGLContextHelper*);
+    ~GpuTimer();
+    void start();
+    double end();
 private:
     unsigned fQuery;
     int fStarted;
diff --git a/bench/BenchSysTimer_mach.cpp b/tools/timer/SysTimer_mach.cpp
index 1f0a6b9861..aca12dee52 100644
--- a/bench/BenchSysTimer_mach.cpp
+++ b/tools/timer/SysTimer_mach.cpp
@@ -1,17 +1,12 @@
-
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-#include "BenchSysTimer_mach.h"
-
-//Time
-#include <mach/mach.h>
-#include <mach/mach_time.h>
+#include "SysTimer_mach.h"
 
-static time_value_t macCpuTime() {
+static time_value_t mac_cpu_time() {
     mach_port_t task = mach_task_self();
     if (task == MACH_PORT_NULL) {
         time_value_t none = {0, 0};
@@ -21,10 +16,9 @@ static time_value_t macCpuTime() {
     task_thread_times_info thread_info_data;
     mach_msg_type_number_t thread_info_count = TASK_THREAD_TIMES_INFO_COUNT;
     if (KERN_SUCCESS != task_info(task,
-                 TASK_THREAD_TIMES_INFO,
-                 reinterpret_cast<task_info_t>(&thread_info_data),
-                 &thread_info_count))
-    {
+                                  TASK_THREAD_TIMES_INFO,
+                                  reinterpret_cast<task_info_t>(&thread_info_data),
+                                  &thread_info_count)) {
         time_value_t none = {0, 0};
         return none;
     }
@@ -33,44 +27,40 @@ static time_value_t macCpuTime() {
     return thread_info_data.user_time;
 }
 
-static double intervalInMSec(const time_value_t start_clock
-                           , const time_value_t end_clock)
-{
+static double interval_in_ms(time_value_t start_clock, time_value_t end_clock) {
     double duration_clock;
     if ((end_clock.microseconds - start_clock.microseconds) < 0) {
-        duration_clock = (end_clock.seconds - start_clock.seconds-1)*1000;
-        duration_clock += (1000000
-                           + end_clock.microseconds
-                           - start_clock.microseconds) / 1000.0;
+        duration_clock = (end_clock.seconds - start_clock.seconds-1) * 1000;
+        duration_clock += (1000000 + end_clock.microseconds - start_clock.microseconds) / 1000.0;
     } else {
-        duration_clock = (end_clock.seconds - start_clock.seconds)*1000;
-        duration_clock += (end_clock.microseconds - start_clock.microseconds)
-                           / 1000.0;
+        duration_clock = (end_clock.seconds - start_clock.seconds) * 1000;
+        duration_clock += (end_clock.microseconds - start_clock.microseconds) / 1000.0;
     }
     return duration_clock;
 }
 
-void BenchSysTimer::startWall() {
-    this->fStartWall = mach_absolute_time();
+void SysTimer::startWall() {
+    fStartWall = mach_absolute_time();
 }
-void BenchSysTimer::startCpu() {
-    this->fStartCpu = macCpuTime();
+
+void SysTimer::startCpu() {
+    fStartCpu = mac_cpu_time();
 }
 
-double BenchSysTimer::endCpu() {
-    time_value_t end_cpu = macCpuTime();
-    return intervalInMSec(this->fStartCpu, end_cpu);
+double SysTimer::endCpu() {
+    time_value_t end_cpu = mac_cpu_time();
+    return interval_in_ms(fStartCpu, end_cpu);
 }
-double BenchSysTimer::endWall() {
+
+double SysTimer::endWall() {
     uint64_t end_wall = mach_absolute_time();
 
-    uint64_t elapsed = end_wall - this->fStartWall;
+    uint64_t elapsed = end_wall - fStartWall;
     mach_timebase_info_data_t sTimebaseInfo;
     if (KERN_SUCCESS != mach_timebase_info(&sTimebaseInfo)) {
         return 0;
     } else {
-        uint64_t elapsedNano = elapsed * sTimebaseInfo.numer
-                               / sTimebaseInfo.denom;
+        uint64_t elapsedNano = elapsed * sTimebaseInfo.numer / sTimebaseInfo.denom;
         return elapsedNano / 1000000.0;
     }
 }
diff --git a/bench/BenchSysTimer_mach.h b/tools/timer/SysTimer_mach.h
index 44d0e5eb49..8c21d57b36 100644
--- a/bench/BenchSysTimer_mach.h
+++ b/tools/timer/SysTimer_mach.h
@@ -1,18 +1,16 @@
-
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-#ifndef SkBenchSysTimer_DEFINED
-#define SkBenchSysTimer_DEFINED
+#ifndef SysTimer_DEFINED
+#define SysTimer_DEFINED
 
-//Time
 #include <mach/mach.h>
 #include <mach/mach_time.h>
 
-class BenchSysTimer {
+class SysTimer {
 public:
     void startWall();
     void startCpu();
diff --git a/bench/BenchSysTimer_posix.cpp b/tools/timer/SysTimer_posix.cpp
index e6767e5af2..4b7d708aab 100644
--- a/bench/BenchSysTimer_posix.cpp
+++ b/tools/timer/SysTimer_posix.cpp
@@ -1,57 +1,51 @@
-
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-#include "BenchSysTimer_posix.h"
-
-//Time
-#include <time.h>
+#include "SysTimer_posix.h"
 
-static double intervalInMSec(const timespec start_clock
-                           , const timespec end_clock)
+static double interval_in_ms(timespec start_clock, timespec end_clock)
 {
     double duration_clock;
     if ((end_clock.tv_nsec - start_clock.tv_nsec) < 0) {
-        duration_clock = (end_clock.tv_sec - start_clock.tv_sec-1)*1000;
-        duration_clock += (1000000000 + end_clock.tv_nsec - start_clock.tv_nsec)
-                           / 1000000.0;
+        duration_clock = (end_clock.tv_sec - start_clock.tv_sec - 1) * 1000;
+        duration_clock += (1000000000 + end_clock.tv_nsec - start_clock.tv_nsec) / 1000000.0;
     } else {
-        duration_clock = (end_clock.tv_sec - start_clock.tv_sec)*1000;
+        duration_clock = (end_clock.tv_sec - start_clock.tv_sec) * 1000;
         duration_clock += (end_clock.tv_nsec - start_clock.tv_nsec) / 1000000.0;
     }
     return duration_clock;
 }
 
-void BenchSysTimer::startWall() {
-    if (-1 == clock_gettime(CLOCK_MONOTONIC, &this->fWall)) {
+void SysTimer::startWall() {
+    if (-1 == clock_gettime(CLOCK_MONOTONIC, &fWall)) {
         timespec none = {0, 0};
-        this->fWall = none;
+        fWall = none;
     }
 }
-void BenchSysTimer::startCpu() {
-    if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &this->fCpu)) {
+void SysTimer::startCpu() {
+    if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &fCpu)) {
         timespec none = {0, 0};
-        this->fCpu = none;
+        fCpu = none;
     }
 }
 
-double BenchSysTimer::endCpu() {
+double SysTimer::endCpu() {
     timespec end_cpu;
     if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &end_cpu)) {
         timespec none = {0, 0};
         end_cpu = none;
     }
-    return intervalInMSec(this->fCpu, end_cpu);
+    return interval_in_ms(fCpu, end_cpu);
 }
 
-double BenchSysTimer::endWall() {
+double SysTimer::endWall() {
     timespec end_wall;
     if (-1 == clock_gettime(CLOCK_MONOTONIC, &end_wall)) {
         timespec none = {0, 0};
         end_wall = none;
     }
-    return intervalInMSec(this->fWall, end_wall);
+    return interval_in_ms(fWall, end_wall);
 }
diff --git a/bench/BenchSysTimer_posix.h b/tools/timer/SysTimer_posix.h
index 8fd97061b6..1eca909e26 100644
--- a/bench/BenchSysTimer_posix.h
+++ b/tools/timer/SysTimer_posix.h
@@ -1,17 +1,15 @@
-
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-#ifndef SkBenchSysTimer_DEFINED
-#define SkBenchSysTimer_DEFINED
+#ifndef SysTimer_DEFINED
+#define SysTimer_DEFINED
 
-//Time
 #include <time.h>
 
-class BenchSysTimer {
+class SysTimer {
 public:
     void startWall();
     void startCpu();
diff --git a/bench/BenchSysTimer_windows.cpp b/tools/timer/SysTimer_windows.cpp
index fab657a8c3..2f9d0a5d58 100644
--- a/bench/BenchSysTimer_windows.cpp
+++ b/tools/timer/SysTimer_windows.cpp
@@ -1,25 +1,17 @@
-
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-#include "BenchSysTimer_windows.h"
-
-//Time
-#define WIN32_LEAN_AND_MEAN 1
-#include <windows.h>
+#include "SysTimer_windows.h"
 
-static ULONGLONG winCpuTime() {
+static ULONGLONG win_cpu_time() {
     FILETIME createTime;
     FILETIME exitTime;
     FILETIME usrTime;
     FILETIME sysTime;
-    if (0 == GetProcessTimes(GetCurrentProcess()
-                           , &createTime, &exitTime
-                           , &sysTime, &usrTime))
-    {
+    if (0 == GetProcessTimes(GetCurrentProcess(), &createTime, &exitTime, &sysTime, &usrTime)) {
         return 0;
     }
     ULARGE_INTEGER start_cpu_sys;
@@ -31,27 +23,27 @@ static ULONGLONG winCpuTime() {
     return start_cpu_sys.QuadPart + start_cpu_usr.QuadPart;
 }
 
-void BenchSysTimer::startWall() {
-    if (0 == ::QueryPerformanceCounter(&this->fStartWall)) {
-        this->fStartWall.QuadPart = 0;
+void SysTimer::startWall() {
+    if (0 == ::QueryPerformanceCounter(&fStartWall)) {
+        fStartWall.QuadPart = 0;
     }
 }
-void BenchSysTimer::startCpu() {
-    this->fStartCpu = winCpuTime();
+void SysTimer::startCpu() {
+    fStartCpu = win_cpu_time();
 }
 
-double BenchSysTimer::endCpu() {
-    ULONGLONG end_cpu = winCpuTime();
-    return static_cast<double>((end_cpu - this->fStartCpu)) / 10000.0L;
+double SysTimer::endCpu() {
+    ULONGLONG end_cpu = win_cpu_time();
+    return static_cast<double>(end_cpu - fStartCpu) / 10000.0L;
 }
-double BenchSysTimer::endWall() {
+double SysTimer::endWall() {
     LARGE_INTEGER end_wall;
     if (0 == ::QueryPerformanceCounter(&end_wall)) {
         end_wall.QuadPart = 0;
     }
 
     LARGE_INTEGER ticks_elapsed;
-    ticks_elapsed.QuadPart = end_wall.QuadPart - this->fStartWall.QuadPart;
+    ticks_elapsed.QuadPart = end_wall.QuadPart - fStartWall.QuadPart;
 
     LARGE_INTEGER frequency;
     if (0 == ::QueryPerformanceFrequency(&frequency)) {
diff --git a/bench/BenchSysTimer_windows.h b/tools/timer/SysTimer_windows.h
index 469332e4ed..62a9445134 100644
--- a/bench/BenchSysTimer_windows.h
+++ b/tools/timer/SysTimer_windows.h
@@ -1,18 +1,17 @@
-
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-#ifndef SkBenchSysTimer_DEFINED
-#define SkBenchSysTimer_DEFINED
+#ifndef SysTimer_DEFINED
+#define SysTimer_DEFINED
 
 //Time
 #define WIN32_LEAN_AND_MEAN 1
 #include <windows.h>
 
-class BenchSysTimer {
+class SysTimer {
 public:
     void startWall();
     void startCpu();
diff --git a/tools/timer/Timer.cpp b/tools/timer/Timer.cpp
new file mode 100644
index 0000000000..4f3fc85cff
--- /dev/null
+++ b/tools/timer/Timer.cpp
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#include "Timer.h"
+
+Timer::Timer(SkGLContextHelper* gl)
+        : fCpu(-1.0)
+        , fWall(-1.0)
+        , fTruncatedCpu(-1.0)
+        , fTruncatedWall(-1.0)
+        , fGpu(-1.0)
+#if SK_SUPPORT_GPU
+        , fGpuTimer(gl)
+#endif
+        {}
+
+void Timer::start() {
+    fSysTimer.startWall();
+    fTruncatedSysTimer.startWall();
+#if SK_SUPPORT_GPU
+    fGpuTimer.start();
+#endif
+    fSysTimer.startCpu();
+    fTruncatedSysTimer.startCpu();
+}
+
+void Timer::end() {
+    fCpu = fSysTimer.endCpu();
+#if SK_SUPPORT_GPU
+    //It is important to stop the cpu clocks first,
+    //as the following will cpu wait for the gpu to finish.
+    fGpu = fGpuTimer.end();
+#endif
+    fWall = fSysTimer.endWall();
+}
+
+void Timer::truncatedEnd() {
+    fTruncatedCpu = fTruncatedSysTimer.endCpu();
+    fTruncatedWall = fTruncatedSysTimer.endWall();
+}
+
+WallTimer::WallTimer() : fWall(-1.0) {}
+
+void WallTimer::start() {
+    fSysTimer.startWall();
+}
+
+void WallTimer::end() {
+    fWall = fSysTimer.endWall();
+}
diff --git a/bench/BenchTimer.h b/tools/timer/Timer.h
index 2abf10b80f..7a91ac6e53 100644
--- a/bench/BenchTimer.h
+++ b/tools/timer/Timer.h
@@ -1,18 +1,25 @@
-
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-#ifndef SkBenchTimer_DEFINED
-#define SkBenchTimer_DEFINED
+#ifndef Timer_DEFINED
+#define Timer_DEFINED
 
-#include <SkTypes.h>
+#include "SkTypes.h"
 
+#if defined(SK_BUILD_FOR_WIN32)
+    #include "SysTimer_windows.h"
+#elif defined(SK_BUILD_FOR_MAC)
+    #include "SysTimer_mach.h"
+#elif defined(SK_BUILD_FOR_UNIX) || defined(SK_BUILD_FOR_ANDROID)
+    #include "SysTimer_posix.h"
+#endif
 
-class BenchSysTimer;
-class BenchGpuTimer;
+#if SK_SUPPORT_GPU
+    #include "GpuTimer.h"
+#endif
 
 class SkGLContextHelper;
 
@@ -25,13 +32,15 @@ class SkGLContextHelper;
  * times and (for GPU configurations) can be used to roughly (very
  * roughly) gauge the GPU load/backlog.
  */
-class BenchTimer {
+class Timer {
 public:
-    BenchTimer(SkGLContextHelper* gl = NULL);
-    ~BenchTimer();
-    void start(double durationScale = 1);
-    void end();
+    explicit Timer(SkGLContextHelper* gl = NULL);
+
+    void start();
     void truncatedEnd();
+    void end();
+
+    // All times in milliseconds.
     double fCpu;
     double fWall;
     double fTruncatedCpu;
@@ -39,29 +48,26 @@ public:
     double fGpu;
 
 private:
-    BenchSysTimer* fSysTimer;
-    BenchSysTimer* fTruncatedSysTimer;
+    SysTimer fSysTimer;
+    SysTimer fTruncatedSysTimer;
 #if SK_SUPPORT_GPU
-    BenchGpuTimer* fGpuTimer;
+    GpuTimer fGpuTimer;
 #endif
-    double fDurationScale;  // for this start/end session
 };
 
-// Same as BenchTimer above, supporting only fWall but with much lower overhead.
-// (Typically, ~30ns instead of BenchTimer's ~1us.)
+// Same as Timer above, supporting only fWall but with much lower overhead.
+// (Typically, ~30ns instead of Timer's ~1us.)
 class WallTimer {
 public:
     WallTimer();
-    ~WallTimer();
 
-    void start(double durationScale = 1);
+    void start();
     void end();
 
-    double fWall;
+    double fWall;  // Milliseconds.
 
 private:
-    BenchSysTimer* fSysTimer;
-    double fDurationScale;
+    SysTimer fSysTimer;
 };
 
 #endif
diff --git a/bench/TimerData.cpp b/tools/timer/TimerData.cpp
index 0cb000280b..21529bc2e0 100644
--- a/bench/TimerData.cpp
+++ b/tools/timer/TimerData.cpp
@@ -1,4 +1,3 @@
-
 /*
  * Copyright 2012 Google Inc.
  *
@@ -7,22 +6,19 @@
  */
 #include "TimerData.h"
 
-#include "BenchTimer.h"
+#include "Timer.h"
 #include <limits>
 
-using namespace std;
-
 TimerData::TimerData(int maxNumTimings)
-: fMaxNumTimings(maxNumTimings)
-, fCurrTiming(0)
-, fWallTimes(maxNumTimings)
-, fTruncatedWallTimes(maxNumTimings)
-, fCpuTimes(maxNumTimings)
-, fTruncatedCpuTimes(maxNumTimings)
-, fGpuTimes(maxNumTimings){
-}
-
-bool TimerData::appendTimes(BenchTimer* timer) {
+    : fMaxNumTimings(maxNumTimings)
+    , fCurrTiming(0)
+    , fWallTimes(maxNumTimings)
+    , fTruncatedWallTimes(maxNumTimings)
+    , fCpuTimes(maxNumTimings)
+    , fTruncatedCpuTimes(maxNumTimings)
+    , fGpuTimes(maxNumTimings) {}
+
+bool TimerData::appendTimes(Timer* timer) {
     SkASSERT(timer != NULL);
     if (fCurrTiming >= fMaxNumTimings) {
         return false;
diff --git a/bench/TimerData.h b/tools/timer/TimerData.h
index fb84df1a9e..35e94dca1d 100644
--- a/bench/TimerData.h
+++ b/tools/timer/TimerData.h
@@ -1,4 +1,3 @@
-
 /*
  * Copyright 2012 Google Inc.
  *
@@ -23,7 +22,7 @@
     #pragma warning(pop)
 #endif
 
-class BenchTimer;
+class Timer;
 
 class TimerData {
 public:
@@ -33,12 +32,12 @@ public:
     explicit TimerData(int maxNumTimings);
 
     /**
-     * Collect times from the BenchTimer for an iteration. It will fail if called more often than
+     * Collect times from the Timer for an iteration. It will fail if called more often than
      * indicated in the constructor.
      *
-     * @param BenchTimer Must not be null.
+     * @param Timer Must not be null.
      */
-    bool appendTimes(BenchTimer*);
+    bool appendTimes(Timer*);
 
     enum Result {
         kMin_Result,