Allow self_size to be larger than 2GB in heap snapshots.

include/v8-profiler.h

 // Copyright 2010 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 239 matching lines @@
    */
   Handle<String> GetName() const;
 
   /**
    * Returns node id. For the same heap object, the id remains the same
    * across all snapshots.
    */
   SnapshotObjectId GetId() const;
 
   /** Returns node's own size, in bytes. */
-  int GetSelfSize() const;
+  V8_DEPRECATED("Use GetShallowSize instead",
+                int GetSelfSize() const);
+
+  /** Returns node's own size, in bytes. */
+  size_t GetShallowSize() const;
 
   /** Returns child nodes count of the node. */
   int GetChildrenCount() const;
 
   /** Retrieves a child by index. */
   const HeapGraphEdge* GetChild(int index) const;
 };
 
 
 /**
@@ skipping 284 matching lines @@
   uint32_t index;  // Index of the time interval that was changed.
   uint32_t count;  // New value of count field for the interval with this index.
   uint32_t size;  // New value of size field for the interval with this index.
 };
 
 
 }  // namespace v8
 
 
 #endif  // V8_V8_PROFILER_H_