Add v8::HeapGraphNode::GetHeapValue method.

src/profile-generator.h

 // Copyright 2011 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 570 matching lines @@
                          const char* name,
                          HeapEntry* entry,
                          int retainer_index);
   void SetUnidirElementReference(int child_index, int index, HeapEntry* entry);
 
   int EntrySize() { return EntriesSize(1, children_count_, retainers_count_); }
   int RetainedSize(bool exact);
 
   void Print(int max_depth, int indent);
 
+  Handle<HeapObject> GetHeapObject();
+
   static int EntriesSize(int entries_count,
                          int children_count,
                          int retainers_count);
 
  private:
   HeapGraphEdge* children_arr() {
     return reinterpret_cast<HeapGraphEdge*>(this + 1);
   }
   HeapGraphEdge** retainers_arr() {
     return reinterpret_cast<HeapGraphEdge**>(children_arr() + children_count_);
@@ skipping 158 matching lines @@
       HeapSnapshot::Type type, const char* name, unsigned uid);
   void SnapshotGenerationFinished(HeapSnapshot* snapshot);
   List<HeapSnapshot*>* snapshots() { return &snapshots_; }
   HeapSnapshot* GetSnapshot(unsigned uid);
   void RemoveSnapshot(HeapSnapshot* snapshot);
 
   StringsStorage* names() { return &names_; }
   TokenEnumerator* token_enumerator() { return token_enumerator_; }
 
   uint64_t GetObjectId(Address addr) { return ids_.FindObject(addr); }
+  Handle<HeapObject> FindHeapObjectById(uint64_t id);
   void ObjectMoveEvent(Address from, Address to) { ids_.MoveObject(from, to); }
 
  private:
   INLINE(static bool HeapSnapshotsMatch(void* key1, void* key2)) {
     return key1 == key2;
   }
 
   bool is_tracking_objects_;  // Whether tracking object moves is needed.
   List<HeapSnapshot*> snapshots_;
   // Mapping from snapshots' uids to HeapSnapshot* pointers.
@@ skipping 344 matching lines @@
 
   friend class HeapSnapshotJSONSerializerEnumerator;
   friend class HeapSnapshotJSONSerializerIterator;
 
   DISALLOW_COPY_AND_ASSIGN(HeapSnapshotJSONSerializer);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROFILE_GENERATOR_H_