Add a UseCounter that measures the amount of memory used in PartitionAlloc

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 125 matching lines @@
 static double currentTimeFunction()
 {
     return Platform::current()->currentTime();
 }
 
 static double monotonicallyIncreasingTimeFunction()
 {
     return Platform::current()->monotonicallyIncreasingTime();
 }
 
+static void histogramEnumerationFunction(const char* name, int sample, int boundaryValue)
+{
+    Platform::current()->histogramEnumeration(name, sample, boundaryValue);
+}
+
 static void cryptographicallyRandomValues(unsigned char* buffer, size_t length)
 {
     Platform::current()->cryptographicallyRandomValues(buffer, length);
 }
 
 static void callOnMainThreadFunction(WTF::MainThreadFunction function, void* context)
 {
     Platform::current()->mainThread()->postTask(FROM_HERE, new MainThreadTaskRunner(function, context));
 }
 
 void initializeWithoutV8(Platform* platform)
 {
     ASSERT(!s_webKitInitialized);
     s_webKitInitialized = true;
 
     ASSERT(platform);
     Platform::initialize(platform);
 
     WTF::setRandomSource(cryptographicallyRandomValues);
-    WTF::initialize(currentTimeFunction, monotonicallyIncreasingTimeFunction);
+    WTF::initialize(currentTimeFunction, monotonicallyIncreasingTimeFunction, histogramEnumerationFunction);
     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()) {
         ASSERT(!s_pendingGCRunner);
         s_pendingGCRunner = new PendingGCRunner;
         currentThread->addTaskObserver(s_pendingGCRunner);
 
@@ skipping 99 matching lines @@
 #endif // !LOG_DISABLED
 }
 
 void resetPluginCache(bool reloadPages)
 {
     ASSERT(!reloadPages);
     Page::refreshPlugins();
 }
 
 } // namespace blink