Update V8GCController to use new V8 GC-related APIs.

Source/bindings/v8/V8PerIsolateData.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 64 matching lines @@
 
 void V8PerIsolateData::ensureInitialized(v8::Isolate* isolate) 
 {
     ASSERT(isolate);
     if (!isolate->GetData()) 
         create(isolate);
 }
 
 v8::Persistent<v8::Value> V8PerIsolateData::ensureLiveRoot()
 {
-    if (m_liveRoot.isEmpty())
+    if (m_liveRoot.isEmpty()) {
         m_liveRoot.set(v8::Null());
+        v8::UniqueId id(reinterpret_cast<intptr_t>(*(m_liveRoot.get())));
+        v8::V8::SetObjectGroupId(m_isolate, m_liveRoot.get(), id);
+    }
     return m_liveRoot.get();
 }
 
 void V8PerIsolateData::dispose(v8::Isolate* isolate)
 {
     void* data = isolate->GetData();
     delete static_cast<V8PerIsolateData*>(data);
     isolate->SetData(0);
 }
 
@@ skipping 97 matching lines @@
     // changes to a DOM constructor's toString's toString will cause the
     // toString of the DOM constructor itself to change. This is extremely
     // obscure and unlikely to be a problem.
     v8::Handle<v8::Value> value = args.Callee()->Get(v8::String::NewSymbol("toString"));
     if (!value->IsFunction()) 
         return v8::String::Empty(args.GetIsolate());
     return v8::Handle<v8::Function>::Cast(value)->Call(args.This(), 0, 0);
 }
 
 } // namespace WebCore