Revert of add gm to show miplevels (patchset #2 id:20001 of https://codereview.chromium.org/849173004/)

Reason for revert:
==31530==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 224 byte(s) in 2 object(s) allocated from:
    #0 0x7febb223f65b in operator new(unsigned long) (/home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/dm+0x35865b)
    #1 0x7febb3483c56 in SkMipMap::Build(SkBitmap const&, SkDiscardableMemory* (*)(unsigned long)) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../src/core/SkMipMap.cpp:181:9
    #2 0x7febb2c37914 in ShowMipLevels::onDraw(SkCanvas*) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../gm/downsamplebitmap.cpp:228:24
    #3 0x7febb2295736 in skiagm::GM::drawContent(SkCanvas*) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../gm/gm.cpp:32:5
    #4 0x7febb2295019 in skiagm::GM::draw(SkCanvas*) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../gm/gm.cpp:24:5
    #5 0x7febb226722f in DM::GMSrc::draw(SkCanvas*) const /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../dm/DMSrcSink.cpp:22:5
    #6 0x7febb226d929 in DM::RasterSink::draw(DM::Src const&, SkBitmap*, SkWStream*) const /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../dm/DMSrcSink.cpp:230:12
    #7 0x7febb224e004 in Task::Run(Task*) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../dm/DM.cpp:254:25
    #8 0x7febb3805e4c in (anonymous namespace)::ThreadPool::Loop(void*) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../src/core/SkTaskGroup.cpp:149:13
    #9 0x7febb460dc7c in thread_start(void*) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../src/utils/SkThreadUtils_pthread.cpp:66:9
    #10 0x7febb1251f6d in start_thread /build/buildd/eglibc-2.17/nptl/pthread_create.c:311

Indirect leak of 699528 byte(s) in 2 object(s) allocated from:
    #0 0x7febb22214ab in __interceptor_malloc (/home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/dm+0x33a4ab)
    #1 0x7febb473e3c6 in sk_malloc_flags(unsigned long, unsigned int) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../src/ports/SkMemory_malloc.cpp:54:15
    #2 0x7febb473e19a in sk_malloc_throw(unsigned long) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../src/ports/SkMemory_malloc.cpp:40:12
    #3 0x7febb3483c94 in SkMipMap::Build(SkBitmap const&, SkDiscardableMemory* (*)(unsigned long)) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../src/core/SkMipMap.cpp:181:18
    #4 0x7febb2c37914 in ShowMipLevels::onDraw(SkCanvas*) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../gm/downsamplebitmap.cpp:228:24
    #5 0x7febb2295736 in skiagm::GM::drawContent(SkCanvas*) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../gm/gm.cpp:32:5
    #6 0x7febb2295019 in skiagm::GM::draw(SkCanvas*) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../gm/gm.cpp:24:5
    #7 0x7febb226722f in DM::GMSrc::draw(SkCanvas*) const /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../dm/DMSrcSink.cpp:22:5
    #8 0x7febb226d929 in DM::RasterSink::draw(DM::Src const&, SkBitmap*, SkWStream*) const /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../dm/DMSrcSink.cpp:230:12
    #9 0x7febb224e004 in Task::Run(Task*) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../dm/DM.cpp:254:25
    #10 0x7febb3805e4c in (anonymous namespace)::ThreadPool::Loop(void*) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../src/core/SkTaskGroup.cpp:149:13
    #11 0x7febb460dc7c in thread_start(void*) /home/default/storage/skia-repo/buildbot/skiabot-linux-xsan-001/build/slave/Test-Ubuntu13_10-GCE-NoGPU-x86_64-Debug-ASAN/build/skia/out/Debug/../../src/utils/SkThreadUtils_pthread.cpp:66:9
    #12 0x7febb1251f6d in start_thread /build/buildd/eglibc-2.17/nptl/pthread_create.c:311

Original issue's description:
> add gm to show miplevels
>
> BUG=skia:
> TBR=
>
> NOTREECHECKS=true
>
> Committed: https://skia.googlesource.com/skia/+/a598f4b773f066a939e0216a116c179b90550727

TBR=reed@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/854103004

1 files changed, 13 insertions, 72 deletions

diff --git a/gm/downsamplebitmap.cpp b/gm/downsamplebitmap.cpp
index 50b15494b6..ce10b47a84 100644
--- a/gm/downsamplebitmap.cpp
+++ b/gm/downsamplebitmap.cpp
@@ -14,22 +14,6 @@
 #include "SkStream.h"
 #include "SkPaint.h"
 
-static void make_checker(SkBitmap* bm, int size, int numChecks) {
-    bm->allocN32Pixels(size, size);
-    for (int y = 0; y < size; ++y) {
-        for (int x = 0; x < size; ++x) {
-            SkPMColor* s = bm->getAddr32(x, y);
-            int cx = (x * numChecks) / size;
-            int cy = (y * numChecks) / size;
-            if ((cx+cy)%2) {
-                *s = 0xFFFFFFFF;
-            } else {
-                *s = 0xFF000000;
-            }
-        }
-    }
-}
-
 static void setTypeface(SkPaint* paint, const char name[], SkTypeface::Style style) {
     sk_tool_utils::set_portable_typeface(paint, name, style);
 }
@@ -155,7 +139,19 @@ class DownsampleBitmapCheckerboardGM: public DownsampleBitmapGM {
       int fNumChecks;
 
       void make_bitmap() SK_OVERRIDE {
-          make_checker(&fBM, fSize, fNumChecks);
+          fBM.allocN32Pixels(fSize, fSize);
+          for (int y = 0; y < fSize; ++y) {
+              for (int x = 0; x < fSize; ++x) {
+                  SkPMColor* s = fBM.getAddr32(x, y);
+                  int cx = (x * fNumChecks) / fSize;
+                  int cy = (y * fNumChecks) / fSize;
+                  if ((cx+cy)%2) {
+                      *s = 0xFFFFFFFF;
+                  } else {
+                      *s = 0xFF000000;
+                  }
+              }
+          }
       }
   private:
       typedef DownsampleBitmapGM INHERITED;
@@ -194,59 +190,6 @@ class DownsampleBitmapImageGM: public DownsampleBitmapGM {
       typedef DownsampleBitmapGM INHERITED;
 };
 
-#include "SkMipMap.h"
-class ShowMipLevels : public skiagm::GM {
-public:
-    SkBitmap    fBM;
-
-    ShowMipLevels() {
-        this->setBGColor(0xFFDDDDDD);
-        make_checker(&fBM, 512, 256);
-    }
-
-protected:
-#if 0
-    uint32_t onGetFlags() const SK_OVERRIDE {
-        return kSkipTiled_Flag;
-    }
-#endif
-
-    SkString onShortName() SK_OVERRIDE {
-        return SkString("showmiplevels");
-    }
-
-    SkISize onISize() SK_OVERRIDE {
-        return SkISize::Make(fBM.width() + 4, 4 * fBM.height());
-    }
-
-    void onDraw(SkCanvas* canvas) SK_OVERRIDE {
-        SkScalar x = 4;
-        SkScalar y = 4;
-        canvas->drawBitmap(fBM, x, y, NULL);
-        y += fBM.height() + 4;
-
-        SkMipMap* mm = SkMipMap::Build(fBM, NULL);
-
-        SkMipMap::Level level;
-        SkScalar scale = 0.5f;
-        while (mm->extractLevel(scale, &level)) {
-            SkImageInfo info = SkImageInfo::MakeN32Premul(level.fWidth, level.fHeight);
-            SkBitmap bm;
-            bm.installPixels(info, level.fPixels, level.fRowBytes);
-            canvas->drawBitmap(bm, x, y, NULL);
-            y += bm.height() + 4;
-            scale /= 2;
-            if (info.width() == 1 || info.height() == 1) {
-                break;
-            }
-        }
-    }
-    
-private:
-    typedef skiagm::GM INHERITED;
-};
-
-
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return new DownsampleBitmapTextGM(72, SkPaint::kHigh_FilterLevel); )
@@ -272,5 +215,3 @@ DEF_GM( return new DownsampleBitmapCheckerboardGM(512,256, SkPaint::kNone_Filter
 DEF_GM( return new DownsampleBitmapImageGM("mandrill_512.png", SkPaint::kNone_FilterLevel); )
 DEF_GM( return new DownsampleBitmapImageGM("mandrill_132x132_12x12.astc",
                                            SkPaint::kNone_FilterLevel); )
-
-DEF_GM( return new ShowMipLevels; )