Oilpan: Reduce RefPtr to WorkerGlobalScope.

Source/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 297 matching lines @@
 PassOwnPtr<LifecycleNotifier<ExecutionContext> > ExecutionContext::createLifecycleNotifier()
 {
     return ContextLifecycleNotifier::create(this);
 }
 
 ContextLifecycleNotifier& ExecutionContext::lifecycleNotifier()
 {
     return static_cast<ContextLifecycleNotifier&>(LifecycleContext<ExecutionContext>::lifecycleNotifier());
 }
 
+void ExecutionContext::deleteLifecycleNotifier()
+{
+    m_lifecycleNotifier.clear();
+}
+
 bool ExecutionContext::isIteratingOverObservers() const
 {
     return m_lifecycleNotifier && m_lifecycleNotifier->isIteratingOverObservers();
 }
 
 void ExecutionContext::enforceSandboxFlags(SandboxFlags mask)
 {
     m_sandboxFlags |= mask;
 
     RELEASE_ASSERT(m_client);
     // The SandboxOrigin is stored redundantly in the security origin.
     if (isSandboxed(SandboxOrigin) && m_client->securityContext().securityOrigin() && !m_client->securityContext().securityOrigin()->isUnique()) {
         m_client->securityContext().setSecurityOrigin(SecurityOrigin::createUnique());
         m_client->didUpdateSecurityOrigin();
     }
 }
 
 } // namespace WebCore