Merge 200961 "Set ArrayBufferContents size to 0 on allocation fa..."

Source/wtf/ArrayBufferContents.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2013 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
@@ skipping 116 matching lines @@
     m_sizeInBytes = 0;
     m_isShared = NotShared;
 }
 
 void ArrayBufferContents::DataHolder::allocateNew(unsigned sizeInBytes, SharingType isShared, InitializationPolicy policy)
 {
     ASSERT(!m_data);
     void* data = nullptr;
     allocateMemory(sizeInBytes, policy, data);
     m_data = data;
-    m_sizeInBytes = sizeInBytes;
+    m_sizeInBytes = data ? sizeInBytes : 0;
     m_isShared = isShared;
 }
 
 void ArrayBufferContents::DataHolder::adopt(void* data, unsigned sizeInBytes, SharingType isShared)
 {
     ASSERT(!m_data);
     m_data = data;
     m_sizeInBytes = sizeInBytes;
     m_isShared = isShared;
 }
 
 void ArrayBufferContents::DataHolder::copyMemoryTo(DataHolder& other)
 {
     ASSERT(!other.m_sizeInBytes);
     ArrayBufferContents::freeMemory(other.m_data, other.m_sizeInBytes);
     ArrayBufferContents::allocateMemory(m_sizeInBytes, DontInitialize, other.m_data);
     if (!other.m_data)
         return;
     memcpy(other.m_data, m_data, m_sizeInBytes);
     other.m_sizeInBytes = m_sizeInBytes;
 }
 
 } // namespace WTF