Adding blink gc memory dump infrastructure for thread specific dumps.

Source/platform/heap/Heap.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 662 matching lines @@
 //
 // BaseHeap is a parent class of NormalPageHeap and LargeObjectHeap.
 // NormalPageHeap represents a heap that contains NormalPages
 // and LargeObjectHeap represents a heap that contains LargeObjectPages.
 class PLATFORM_EXPORT BaseHeap {
 public:
     BaseHeap(ThreadState*, int);
     virtual ~BaseHeap();
     void cleanupPages();
 
+    void dumpMemoryInto(WebProcessMemoryDump*, const String* allocatorBaseName);

[Primiano Tucci (use gerrit), 2015/05/21 18:43:10]

nit: const String& ?

[ssid, 2015/05/22 13:34:06]

Done.

 #if ENABLE(ASSERT) || ENABLE(GC_PROFILING)
     BasePage* findPageFromAddress(Address);
 #endif
 #if ENABLE(GC_PROFILING)
     void snapshot(TracedValue*, ThreadState::SnapshotInfo*);
     virtual void snapshotFreeList(TracedValue&) { };
 
     void countMarkedObjects(ClassAgeCountsMap&) const;
     void countObjectsToSweep(ClassAgeCountsMap&) const;
     void incrementMarkedObjectsAge();
@@ skipping 545 matching lines @@
     size_t copySize = previousHeader->payloadSize();
     if (copySize > size)
         copySize = size;
     memcpy(address, previous, copySize);
     return address;
 }
 
 } // namespace blink
 
 #endif // Heap_h