Revert "Oilpan: Expand HashTableBacking buffer when possible"

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 2700 matching lines @@
     using HeapTraits = HeapIndexTrait<VectorBackingHeap>;
     return backingExpand<HeapTraits, HeapTraits::HeapType, HeapTraits::HeaderType>(address, newSize);
 }
 
 bool HeapAllocator::expandInlineVectorBacking(void* address, size_t newSize)
 {
     using HeapTraits = HeapIndexTrait<InlineVectorBackingHeap>;
     return backingExpand<HeapTraits, HeapTraits::HeapType, HeapTraits::HeaderType>(address, newSize);
 }
 
-bool HeapAllocator::expandHashTableBacking(void* address, size_t newSize)
-{
-    typedef HeapIndexTrait<HashTableBackingHeap> HeapTraits;
-    typedef HeapTraits::HeapType HeapType;
-    typedef HeapTraits::HeaderType HeaderType;
-    return backingExpand<HeapTraits, HeapType, HeaderType>(address, newSize);
-}
-
 template<typename HeapTraits>
 void HeapAllocator::backingShrink(void* address, size_t quantizedCurrentSize, size_t quantizedShrunkSize)
 {
     // We shrink the object only if the shrinking will make a non-small
     // prompt-free block.
     // FIXME: Optimize the threshold size.
     if (quantizedCurrentSize <= quantizedShrunkSize + sizeof(HeapObjectHeader) + sizeof(void*) * 32)
         return;
 
     ThreadState* state = ThreadState::current();
@@ skipping 137 matching lines @@
 bool Heap::s_shutdownCalled = false;
 bool Heap::s_lastGCWasConservative = false;
 FreePagePool* Heap::s_freePagePool;
 OrphanedPagePool* Heap::s_orphanedPagePool;
 Heap::RegionTree* Heap::s_regionTree = nullptr;
 size_t Heap::s_allocatedObjectSize = 0;
 size_t Heap::s_allocatedSpace = 0;
 size_t Heap::s_markedObjectSize = 0;
 
 } // namespace blink