Add methods for finding object by its snapshot id and id for an object

src/heap-profiler.h

 // Copyright 2009-2010 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 65 matching lines @@
       uint16_t class_id, v8::HeapProfiler::WrapperInfoCallback callback);
 
   v8::RetainedObjectInfo* ExecuteWrapperClassCallback(uint16_t class_id,
                                                       Object** wrapper);
   void SetRetainedObjectInfo(UniqueId id, RetainedObjectInfo* info);
 
   bool is_tracking_object_moves() const { return is_tracking_object_moves_; }
   bool is_tracking_allocations() { return !allocation_tracker_.is_empty(); }
 
   Handle<HeapObject> FindHeapObjectById(SnapshotObjectId id);
+  void ClearHeapObjectMap();
 
  private:
   Heap* heap() const { return ids_->heap(); }
 
   // Mapping from HeapObject addresses to objects' uids.
   SmartPointer<HeapObjectsMap> ids_;
   List<HeapSnapshot*> snapshots_;
   SmartPointer<StringsStorage> names_;
   unsigned next_snapshot_uid_;
   List<v8::HeapProfiler::WrapperInfoCallback> wrapper_callbacks_;
   SmartPointer<AllocationTracker> allocation_tracker_;
   bool is_tracking_object_moves_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_PROFILER_H_