Remove various Heap* types.

sky/engine/core/dom/ExecutionContext.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * 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:
  * 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
@@ skipping 31 matching lines @@
 public:
     PendingException(const String& errorMessage, int lineNumber, int columnNumber, int scriptId, const String& sourceURL, PassRefPtr<ScriptCallStack> callStack)
         : m_errorMessage(errorMessage)
         , m_lineNumber(lineNumber)
         , m_columnNumber(columnNumber)
         , m_scriptId(scriptId)
         , m_sourceURL(sourceURL)
         , m_callStack(callStack)
     {
     }
-    void trace(Visitor* visitor)
-    {
-        visitor->trace(m_callStack);
-    }
     String m_errorMessage;
     int m_lineNumber;
     int m_columnNumber;
     int m_scriptId;
     String m_sourceURL;
     RefPtr<ScriptCallStack> m_callStack;
 };
 
 ExecutionContext::ExecutionContext()
     : m_client(0)
@@ skipping 175 matching lines @@
 ContextLifecycleNotifier& ExecutionContext::lifecycleNotifier()
 {
     return static_cast<ContextLifecycleNotifier&>(LifecycleContext<ExecutionContext>::lifecycleNotifier());
 }
 
 bool ExecutionContext::isIteratingOverObservers() const
 {
     return m_lifecycleNotifier && m_lifecycleNotifier->isIteratingOverObservers();
 }
 
-void ExecutionContext::trace(Visitor* visitor)
-{
-#if ENABLE(OILPAN)
-    visitor->trace(m_pendingExceptions);
-#endif
-    Supplementable<ExecutionContext>::trace(visitor);
-    LifecycleContext<ExecutionContext>::trace(visitor);
-}
-
 } // namespace blink