Remove ArrayBufferDeallocationObserver

Source/bindings/core/v8/V8Initializer.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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 369 matching lines @@
         WTF::ArrayBufferContents::allocateMemory(size, WTF::ArrayBufferContents::DontInitialize, data);
         return data;
     }
 
     virtual void Free(void* data, size_t size) override
     {
         WTF::ArrayBufferContents::freeMemory(data, size);
     }
 };
 
+void arrayBufferContentsAllocationListener(int size)
+{
+    v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(size);
+}
+
 } // namespace
 
 void V8Initializer::initializeMainThreadIfNeeded()
 {
     ASSERT(isMainThread());
 
     static bool initialized = false;
     if (initialized)
         return;
     initialized = true;
 
     DEFINE_STATIC_LOCAL(ArrayBufferAllocator, arrayBufferAllocator, ());
     gin::IsolateHolder::Initialize(gin::IsolateHolder::kNonStrictMode, &arrayBufferAllocator);
+    WTF::ArrayBufferContents::setAllocationListener(arrayBufferContentsAllocationListener);

[haraken, 2015/06/15 17:33:29]

I'd move this to initializeWithoutV8 in WebKit.cpp. See how
histogramEnumerationFunction in WebKit.cpp works with wtf/PartitionAlloc. We can
do a similar thing.

[binji, 2015/06/15 19:19:46]

Done.

 
     v8::Isolate* isolate = V8PerIsolateData::initialize();
 
     initializeV8Common(isolate);
 
     v8::V8::SetFatalErrorHandler(reportFatalErrorInMainThread);
     v8::V8::AddMessageListener(messageHandlerInMainThread);
     v8::V8::SetFailedAccessCheckCallbackFunction(failedAccessCheckCallbackInMainThread);
     v8::V8::SetAllowCodeGenerationFromStringsCallback(codeGenerationCheckCallbackInMainThread);
 
@@ skipping 61 matching lines @@
 
     v8::V8::AddMessageListener(messageHandlerInWorker);
     v8::V8::SetFatalErrorHandler(reportFatalErrorInWorker);
 
     uint32_t here;
     isolate->SetStackLimit(reinterpret_cast<uintptr_t>(&here - kWorkerMaxStackSize / sizeof(uint32_t*)));
     isolate->SetPromiseRejectCallback(promiseRejectHandlerInWorker);
 }
 
 } // namespace blink