Introduce HeapAllocHooks

third_party/WebKit/Source/platform/heap/Heap.cpp

 /*
  * 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:
  *
  *     * 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 34 matching lines @@
 #include "public/platform/WebMemoryAllocatorDump.h"
 #include "public/platform/WebProcessMemoryDump.h"
 #include "wtf/Assertions.h"
 #include "wtf/DataLog.h"
 #include "wtf/LeakAnnotations.h"
 #include "wtf/MainThread.h"
 #include "wtf/Partitions.h"
 
 namespace blink {
 
+HeapAllocHooks::AllocationHook* HeapAllocHooks::m_allocationHook = nullptr;
+HeapAllocHooks::FreeHook* HeapAllocHooks::m_freeHook = nullptr;
+
 class GCForbiddenScope final {
     DISALLOW_NEW();
 public:
     explicit GCForbiddenScope(ThreadState* state)
         : m_state(state)
     {
         // Prevent nested collectGarbage() invocations.
         m_state->enterGCForbiddenScope();
     }
 
@@ skipping 661 matching lines @@
 size_t Heap::s_wrapperCountAtLastGC = 0;
 size_t Heap::s_collectedWrapperCount = 0;
 size_t Heap::s_partitionAllocSizeAtLastGC = 0;
 double Heap::s_estimatedMarkingTimePerByte = 0.0;
 bool Heap::s_isLowEndDevice = false;
 #if ENABLE(ASSERT)
 uint16_t Heap::s_gcGeneration = 0;
 #endif
 
 } // namespace blink