Oilpan: Vector::reserveCapacity shouldn't reallocate backing storage always

Source/wtf/DefaultAllocator.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 70 matching lines @@
         void* result = backingAllocate(size);
         memset(result, 0, size);
         return reinterpret_cast<Return>(result);
     }
     template <typename Return, typename Metadata>
     static Return malloc(size_t size)
     {
         return reinterpret_cast<Return>(fastMalloc(size));
     }
     WTF_EXPORT static void backingFree(void* address);
+    WTF_EXPORT static inline bool backingExpand(void*, size_t)
+    {
+        return false;
+    }
     static void free(void* address)
     {
         fastFree(address);
     }
     template<typename T>
     static void* newArray(size_t bytes)
     {
         return malloc<void*, void>(bytes);
     }
     static void
@@ skipping 82 matching lines @@
     { \
         ASSERT(location); \
         return location; \
     } \
 private: \
 typedef int __thisIsHereToForceASemicolonAfterThisMacro
 
 using WTF::DefaultAllocator;
 
 #endif // WTF_DefaultAllocator_h