Revert of Oilpan: Remove duplicated code between HeapPage and LargeObject

Source/platform/heap/ThreadState.h

 /*
  * 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 33 matching lines @@
 #include "wtf/Vector.h"
 #include "wtf/text/StringHash.h"
 #include "wtf/text/WTFString.h"
 
 namespace v8 {
 class Isolate;
 };
 
 namespace blink {
 
+class BaseHeap;
 class BaseHeapPage;
 class CallbackStack;
 struct GCInfo;
 class HeapObjectHeader;
 class PageMemoryRegion;
 class PageMemory;
 class PersistentNode;
 class SafePointBarrier;
 class SafePointAwareMutexLocker;
 class ThreadHeap;
@@ skipping 114 matching lines @@
     H(CSSValue)
 
 #define TypedHeapEnumName(Type) Type##Heap,
 
 enum TypedHeaps {
     GeneralHeap = 0,
     VectorBackingHeap,
     InlineVectorBackingHeap,
     HashTableBackingHeap,
     FOR_EACH_TYPED_HEAP(TypedHeapEnumName)
-    LargeObjectHeap,
     // Values used for iteration of heap segments.
     NumberOfHeaps,
 };
 
 #if ENABLE(GC_PROFILING)
 const size_t numberOfGenerationsToTrack = 8;
 const size_t maxHeapObjectAge = numberOfGenerationsToTrack - 1;
 
 struct AgeCounts {
     int ages[numberOfGenerationsToTrack];
@@ skipping 274 matching lines @@
 
     void recordStackEnd(intptr_t* endOfStack)
     {
         m_endOfStack = endOfStack;
     }
 
     // Get one of the heap structures for this thread.
     //
     // The heap is split into multiple heap parts based on object
     // types. To get the index for a given type, use
-    // HeapIndexTrait<Type>::index.
-    ThreadHeap* heap(int heapIndex) const { return m_heaps[heapIndex]; }
+    // HeapTypeTrait<Type>::index.
+    ThreadHeap* heap(int index) const { return m_heaps[index]; }
 
 #if ENABLE(ASSERT) || ENABLE(GC_PROFILING)
     // Infrastructure to determine if an address is within one of the
     // address ranges for the Blink heap. If the address is in the Blink
     // heap the containing heap page is returned.
     BaseHeapPage* findPageFromAddress(Address);
     BaseHeapPage* findPageFromAddress(void* pointer) { return findPageFromAddress(reinterpret_cast<Address>(pointer)); }
 #endif
 
     // List of persistent roots allocated on the given thread.
@@ skipping 265 matching lines @@
         m_locked = false;
     }
 
     MutexBase& m_mutex;
     bool m_locked;
 };
 
 } // namespace blink
 
 #endif // ThreadState_h