Add method for resolving SnapshotObjectId by given object

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 770 matching lines @@
   HeapSnapshot* NewSnapshot(
       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_; }
 
+  SnapshotObjectId FindObjectId(Address object_addr) {
+    return ids_.FindEntry(object_addr);
+  }
   SnapshotObjectId GetObjectId(Address object_addr, int object_size) {
     return ids_.FindOrAddEntry(object_addr, object_size);
   }
   Handle<HeapObject> FindHeapObjectById(SnapshotObjectId id);
   void ObjectMoveEvent(Address from, Address to) { ids_.MoveObject(from, to); }
   SnapshotObjectId last_assigned_id() const {
     return ids_.last_assigned_id();
   }
 
  private:
@@ skipping 385 matching lines @@
 
   friend class HeapSnapshotJSONSerializerEnumerator;
   friend class HeapSnapshotJSONSerializerIterator;
 
   DISALLOW_COPY_AND_ASSIGN(HeapSnapshotJSONSerializer);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROFILE_GENERATOR_H_