Remove Enumeration Histograms from the Blink Platform API.

third_party/WebKit/Source/web/WebKit.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 25 matching lines @@
 #include "bindings/core/v8/V8Initializer.h"
 #include "core/Init.h"
 #include "core/animation/AnimationClock.h"
 #include "core/dom/Microtask.h"
 #include "core/fetch/WebCacheMemoryDumpProvider.h"
 #include "core/frame/Settings.h"
 #include "core/page/Page.h"
 #include "core/workers/WorkerGlobalScopeProxy.h"
 #include "gin/public/v8_platform.h"
 #include "modules/InitModules.h"
+#include "platform/Histogram.h"
 #include "platform/LayoutTestSupport.h"
 #include "platform/Logging.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/fonts/FontCacheMemoryDumpProvider.h"
 #include "platform/graphics/ImageDecodingStore.h"
 #include "platform/heap/GCTaskRunner.h"
 #include "platform/heap/Heap.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebPrerenderingSupport.h"
 #include "public/platform/WebThread.h"
@@ skipping 80 matching lines @@
 static double currentTimeFunction()
 {
     return Platform::current()->currentTimeSeconds();
 }
 
 static double monotonicallyIncreasingTimeFunction()
 {
     return Platform::current()->monotonicallyIncreasingTimeSeconds();
 }
 
-static void histogramEnumerationFunction(const char* name, int sample, int boundaryValue)
+static void maxObservedSizeFunction(size_t sizeInMB)
 {
-    Platform::current()->histogramEnumeration(name, sample, boundaryValue);
+    const size_t supportedMaxSizeInMB = 4 * 1024;
+    if (sizeInMB >= supportedMaxSizeInMB)
+        sizeInMB = supportedMaxSizeInMB - 1;
+
+    // Send a UseCounter only when we see the highest memory usage
+    // we've ever seen.
+    DEFINE_STATIC_LOCAL(EnumerationHistogram, committedSizeHistogram, ("PartitionAlloc.CommittedSize", supportedMaxSizeInMB));
+    committedSizeHistogram.count(sizeInMB);
 }
 
 static void callOnMainThreadFunction(WTF::MainThreadFunction function, void* context)
 {
     Platform::current()->mainThread()->taskRunner()->postTask(BLINK_FROM_HERE, new MainThreadTaskRunner(function, context));
 }
 
 static void adjustAmountOfExternalAllocatedMemory(int size)
 {
     v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(size);
 }
 
 void initializeWithoutV8(Platform* platform)
 {
     ASSERT(!s_webKitInitialized);
     s_webKitInitialized = true;
 
-    WTF::Partitions::initialize(histogramEnumerationFunction);
+    WTF::Partitions::initialize(maxObservedSizeFunction);
     ASSERT(platform);
     Platform::initialize(platform);
 
     WTF::initialize(currentTimeFunction, monotonicallyIncreasingTimeFunction, adjustAmountOfExternalAllocatedMemory);
     WTF::initializeMainThread(callOnMainThreadFunction);
     Heap::init();
 
     ThreadState::attachMainThread();
     // currentThread() is null if we are running on a thread without a message loop.
     if (WebThread* currentThread = platform->currentThread()) {
@@ skipping 123 matching lines @@
     ASSERT(!reloadPages);
     Page::refreshPlugins();
 }
 
 void decommitFreeableMemory()
 {
     WTF::Partitions::decommitFreeableMemory();
 }
 
 } // namespace blink