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

src/api.cc

 // Copyright 2012 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 7468 matching lines @@
       reinterpret_cast<i::HeapProfiler*>(this)->GetSnapshot(index));
 }
 
 
 SnapshotObjectId HeapProfiler::GetObjectId(Handle<Value> value) {
   i::Handle<i::Object> obj = Utils::OpenHandle(*value);
   return reinterpret_cast<i::HeapProfiler*>(this)->GetSnapshotObjectId(obj);
 }
 
 
+Handle<Value> HeapProfiler::FindObjectById(SnapshotObjectId id) {
+  i::Handle<i::Object> obj =
+      reinterpret_cast<i::HeapProfiler*>(this)->FindHeapObjectById(id);
+  if (obj.is_null()) return Local<Value>();
+  return Utils::ToLocal(obj);
+}
+
+
+void HeapProfiler::ClearObjectIds() {
+  reinterpret_cast<i::HeapProfiler*>(this)->ClearHeapObjectMap();
+}
+
+
 const HeapSnapshot* HeapProfiler::TakeHeapSnapshot(
     Handle<String> title,
     ActivityControl* control,
     ObjectNameResolver* resolver) {
   return reinterpret_cast<const HeapSnapshot*>(
       reinterpret_cast<i::HeapProfiler*>(this)->TakeSnapshot(
           *Utils::OpenHandle(*title), control, resolver));
 }
 
 
@@ skipping 281 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal