Introduce WebTaskRunner Patch 3/5

Source/core/dom/CompositorProxy.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/dom/CompositorProxy.h"
 
 #include "bindings/core/v8/ExceptionMessages.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/DOMNodeIds.h"
@@ skipping 129 matching lines @@
 
     incrementProxyCountForElement(m_elementId);
 }
 
 CompositorProxy::CompositorProxy(uint64_t elementId, uint32_t attributeFlags)
     : m_elementId(elementId)
     , m_bitfieldsSupported(attributeFlags)
 {
     ASSERT(isControlThread());
     ASSERT(sanityCheckAttributeFlags(m_bitfieldsSupported));
-    Platform::current()->mainThread()->postTask(FROM_HERE, threadSafeBind(&incrementProxyCountForElement, m_elementId));
+    Platform::current()->mainThread()->taskRunner()->postTask(FROM_HERE, threadSafeBind(&incrementProxyCountForElement, m_elementId));
 }
 
 CompositorProxy::~CompositorProxy()
 {
     if (m_connected)
         disconnect();
 }
 
 bool CompositorProxy::supports(const String& attributeName) const
 {
@@ skipping 84 matching lines @@
         m_connected ? "Attempted to mutate non-mutable attribute." : "Attempted to mutate attribute on a disconnected proxy.");
     return true;
 }
 
 void CompositorProxy::disconnect()
 {
     m_connected = false;
     if (isMainThread())
         decrementCountForElement(m_elementId);
     else
-        Platform::current()->mainThread()->postTask(FROM_HERE, threadSafeBind(&decrementCountForElement, m_elementId));
+        Platform::current()->mainThread()->taskRunner()->postTask(FROM_HERE, threadSafeBind(&decrementCountForElement, m_elementId));
 }
 
 } // namespace blink