Make reallocation of large objects reliable.

third_party/WebKit/Source/platform/heap/HeapPage.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 676 matching lines @@
     Address lazySweep(size_t, size_t gcInfoIndex);
     void sweepUnsweptPage();
     // Returns true if we have swept all pages within the deadline.
     // Returns false otherwise.
     bool lazySweepWithDeadline(double deadlineSeconds);
     void completeSweep();
 
     ThreadState* getThreadState() { return m_threadState; }
     int arenaIndex() const { return m_index; }
 
+    Address allocateLargeObject(size_t allocationSize, size_t gcInfoIndex);
+
 protected:
     BasePage* m_firstPage;
     BasePage* m_firstUnsweptPage;
 
 private:
     virtual Address lazySweepPages(size_t, size_t gcInfoIndex) = 0;
 
     ThreadState* m_threadState;
 
     // Index into the page pools.  This is used to ensure that the pages of the
@@ skipping 206 matching lines @@
         SET_MEMORY_ACCESSIBLE(result, allocationSize - sizeof(HeapObjectHeader));
         ASSERT(findPageFromAddress(headerAddress + allocationSize - 1));
         return result;
     }
     return outOfLineAllocate(allocationSize, gcInfoIndex);
 }
 
 } // namespace blink
 
 #endif // HeapPage_h