Revert of Process Statistics header, add max RSS to render_pdfs (https://codereview.chromium.org/448993003/)

Reason for revert:
Reverting due to breaking iOS bots.

Original issue's description:
> Process Statistics header, add max RSS to render_pdfs
>
> Committed: https://skia.googlesource.com/skia/+/6274baae7fe82ce6481da367687aa6168356e1e1

R=mtklein@google.com, halcanary@google.com
TBR=halcanary@google.com, mtklein@google.com
NOTREECHECKS=true
NOTRY=true

Author: bungeman@google.com

Review URL: https://codereview.chromium.org/448243003

3 files changed, 1 insertions, 65 deletions

diff --git a/tools/ProcStats.cpp b/tools/ProcStats.cpp
deleted file mode 100644
index 94660394f8..0000000000
--- a/tools/ProcStats.cpp
+++ /dev/null
@@ -1,31 +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.
- */
-
-#include "ProcStats.h"
-
-#if defined(SK_BUILD_FOR_UNIX) || \
-    defined(SK_BUILD_FOR_MAC) || \
-    defined(SK_BUILD_FOR_ANDROID)
-
-    #include <sys/resource.h>
-    int sk_tools::getMaxResidentSetSizeKB() {
-        struct rusage ru;
-        getrusage(RUSAGE_SELF, &ru);
-    #if defined(SK_BUILD_FOR_MAC)
-        return static_cast<int>(ru.ru_maxrss / 1024);  // Darwin reports bytes.
-    #else
-        return static_cast<int>(ru.ru_maxrss);  // Linux reports kilobytes.
-    #endif
-    }
-
-#else
-
-    int sk_tools::getMaxResidentSetSizeKB() {
-        return -1;
-    }
-
-#endif
diff --git a/tools/ProcStats.h b/tools/ProcStats.h
deleted file mode 100644
index 42849f1401..0000000000
--- a/tools/ProcStats.h
+++ /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.
- */
-
-#ifndef ProcStats_DEFINED
-#define ProcStats_DEFINED
-
-/**
- * ProcStats - Process Statistics Functions
- */
-
-namespace sk_tools {
-
-/**
- *  If not implemented for this OS, returns -1.  Otherwise, return
- *  the maximum resident set size, as reported by getrusage().
- */
-int getMaxResidentSetSizeKB();
-
-}  // namespace sk_tools
-
-#endif  // ProcStats_DEFINED
diff --git a/tools/render_pdfs_main.cpp b/tools/render_pdfs_main.cpp
index 34e5e58f53..be294399ec 100644
--- a/tools/render_pdfs_main.cpp
+++ b/tools/render_pdfs_main.cpp
@@ -18,7 +18,6 @@
 #include "SkTArray.h"
 #include "SkTSort.h"
 #include "PdfRenderer.h"
-#include "ProcStats.h"
 #include "picture_utils.h"
 
 __SK_FORCE_IMAGE_DECODER_LINKING;
@@ -220,9 +219,7 @@ static int process_input(
             }
         }
     }
-    if (files.count() > 0) {
-        SkTQSort<SkString>(files.begin(), files.end() - 1);
-    }
+    SkTQSort<SkString>(files.begin(), files.end() - 1);
     int failures = 0;
     for (int i = 0; i < files.count(); i ++) {
         if (!render_pdf(files[i], outputDir, renderer)) {
@@ -249,11 +246,6 @@ int tool_main_core(int argc, char** argv) {
 
     int failures = process_input(FLAGS_inputPaths, outputDir, *renderer);
 
-    int max_rss_kb = sk_tools::getMaxResidentSetSizeKB();
-    if (max_rss_kb >= 0) {
-        SkDebugf("%4dM peak ResidentSetSize\n", max_rss_kb / 1024);
-    }
-
     if (failures != 0) {
         SkDebugf("Failed to render %i PDFs.\n", failures);
         return 1;