Update WebFrameTestProxy and WebTestProxy to mostly follow Chrome style.

content/shell/renderer/test_runner/MockColorChooser.h

 // Copyright 2013 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.
 
 #ifndef CONTENT_SHELL_RENDERER_TEST_RUNNER_MOCKCOLORCHOOSER_H_
 #define CONTENT_SHELL_RENDERER_TEST_RUNNER_MOCKCOLORCHOOSER_H_
 
 #include "base/basictypes.h"
 #include "content/shell/renderer/test_runner/TestCommon.h"
 #include "content/shell/renderer/test_runner/WebTask.h"
 #include "third_party/WebKit/public/web/WebColorChooser.h"
 #include "third_party/WebKit/public/web/WebColorChooserClient.h"
 
 namespace content {
 
 class WebTestDelegate;
 class WebTestProxyBase;
 
 class MockColorChooser : public blink::WebColorChooser {
 public:
     MockColorChooser(blink::WebColorChooserClient*, WebTestDelegate*, WebTestProxyBase*);
     virtual ~MockColorChooser();
 
     // blink::WebColorChooser implementation.
     virtual void setSelectedColor(const blink::WebColor) OVERRIDE;
     virtual void endChooser() OVERRIDE;
 
     void invokeDidEndChooser();
-    WebTaskList* taskList() { return &m_taskList; }
+    WebTaskList* mutable_task_list() { return &m_taskList; }
 
 private:
     blink::WebColorChooserClient* m_client;
     WebTestDelegate* m_delegate;
     WebTestProxyBase* m_proxy;
     WebTaskList m_taskList;
 
     DISALLOW_COPY_AND_ASSIGN(MockColorChooser);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_RENDERER_TEST_RUNNER_MOCKCOLORCHOOSER_H_