Refactor code listening to platform events in content/renderer/.

content/shell/renderer/test_runner/gamepad_controller.h

 // Copyright 2014 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_GAMEPAD_CONTROLLER_H_
 #define CONTENT_SHELL_RENDERER_TEST_RUNNER_GAMEPAD_CONTROLLER_H_
 
 #include <map>
 
 #include "base/memory/weak_ptr.h"
 #include "content/public/renderer/renderer_gamepad_provider.h"
 #include "third_party/WebKit/public/platform/WebGamepads.h"
 
 namespace blink {
 class WebFrame;
 class WebGamepadListener;
 }
 
 namespace content {
 
 class WebTestDelegate;
 
 class GamepadController
     : public base::SupportsWeakPtr<GamepadController>,
       public RendererGamepadProvider {
  public:
-  GamepadController();
+  static base::WeakPtr<GamepadController> Create(WebTestDelegate* delegate);
   virtual ~GamepadController();
 
   void Reset();
   void Install(blink::WebFrame* frame);
-  void SetDelegate(WebTestDelegate* delegate);
 
   // RendererGamepadProvider implementation.
   virtual void SampleGamepads(
       blink::WebGamepads& gamepads) OVERRIDE;
-  virtual void SetGamepadListener(
-      blink::WebGamepadListener* listener) OVERRIDE;
+  virtual bool OnControlMessageReceived(const IPC::Message& msg) OVERRIDE;
+  virtual void SendStartMessage() OVERRIDE;
+  virtual void SendStopMessage() OVERRIDE;
 
  private:
   friend class GamepadControllerBindings;
+  GamepadController();
 
   // TODO(b.kelemen): for historical reasons Connect just initializes the
   // object. The 'gamepadconnected' event will be dispatched via
   // DispatchConnected. Tests for connected events need to first connect(),
   // then set the gamepad data and finally call dispatchConnected().
   // We should consider renaming Connect to Init and DispatchConnected to
   // Connect and at the same time updating all the gamepad tests.
   void Connect(int index);
   void DispatchConnected(int index);
 
   void Disconnect(int index);
   void SetId(int index, const std::string& src);
   void SetButtonCount(int index, int buttons);
   void SetButtonData(int index, int button, double data);
   void SetAxisCount(int index, int axes);
   void SetAxisData(int index, int axis, double data);
 
   blink::WebGamepads gamepads_;
 
-  blink::WebGamepadListener* listener_;
-
   // Mapping from gamepad index to connection state.
   std::map<int, bool> pending_changes_;
 
   base::WeakPtrFactory<GamepadController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GamepadController);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_RENDERER_TEST_RUNNER_GAMEPAD_CONTROLLER_H_