Specialize base::IsWeakReceiver for Blink weak pointers to support base::Bind (1/5)

third_party/WebKit/Source/core/dom/MessagePort.cpp

 /*
  * Copyright (C) 2008 Apple 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 108 matching lines @@
     DCHECK(m_entangledChannel);
     m_entangledChannel->setClient(0);
     return std::move(m_entangledChannel);
 }
 
 // Invoked to notify us that there are messages available for this port.
 // This code may be called from another thread, and so should not call any non-threadsafe APIs (i.e. should not call into the entangled channel or access mutable variables).
 void MessagePort::messageAvailable()
 {
     DCHECK(getExecutionContext());
-    getExecutionContext()->postTask(BLINK_FROM_HERE, createCrossThreadTask(&MessagePort::dispatchMessages, CrossThreadWeakPersistentThisPointer<MessagePort>(this)));
+    getExecutionContext()->postTask(BLINK_FROM_HERE, createCrossThreadTask(&MessagePort::dispatchMessages, wrapCrossThreadWeakPersistent(this)));
 }
 
 void MessagePort::start()
 {
     // Do nothing if we've been cloned or closed.
     if (!isEntangled())
         return;
 
     DCHECK(getExecutionContext());
     if (m_started)
@@ skipping 129 matching lines @@
     return portArray;
 }
 
 DEFINE_TRACE(MessagePort)
 {
     ActiveDOMObject::trace(visitor);
     EventTargetWithInlineData::trace(visitor);
 }
 
 } // namespace blink