Keep a persistent handle for the bindings classes to avoid repeated lookups that involve performing…

Source/bindings/dart/DartDOMData.cpp

 /*
  * Copyright (C) 2012 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:
  *
  *     * 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
@@ skipping 24 matching lines @@
 #include "bindings/dart/ThreadSafeDartIsolateWrapper.h"
 #include "core/dom/ScriptExecutionContext.h"
 
 namespace WebCore {
 
 DartDOMData::DartDOMData(ScriptExecutionContext* context, bool isDOMEnabled)
     : m_scriptExecutionContext(context)
     , m_isDOMEnabled(isDOMEnabled)
     , m_recursion(0)
     , m_stringCache()
+    , m_classHandleCache()
 {
 }
 
 DartDOMData::~DartDOMData()
 {
     ASSERT(m_nodeMap.isEmpty());
     ASSERT(m_objectMap.isEmpty());
     ASSERT(m_messagePortMap.isEmpty());
     ASSERT(m_activeObjectMap.isEmpty());
 }
@@ skipping 24 matching lines @@
 }
 
 PassRefPtr<ThreadSafeDartIsolateWrapper> DartDOMData::threadSafeIsolateWrapper()
 {
     ASSERT(m_threadSafeIsolateWrapper);
     MutexLocker locker(m_isolateWrapperMutex);
     return m_threadSafeIsolateWrapper;
 }
 
 }