Revert of Refactoring gamepad polling to support dynamically added sources

content/browser/gamepad/gamepad_service.h

Index: content/browser/gamepad/gamepad_service.h
diff --git a/content/browser/gamepad/gamepad_service.h b/content/browser/gamepad/gamepad_service.h
index c1c9e5df283faa14e0110012f97c273198ea2f3f..22bea8c02a850cd230f5ca2a07b68925dbf899c6 100644
--- a/content/browser/gamepad/gamepad_service.h
+++ b/content/browser/gamepad/gamepad_service.h
@@ -79,8 +79,6 @@
   // Called on IO thread when a gamepad is disconnected.
   void OnGamepadDisconnected(int index, const blink::WebGamepad& pad);
 
-  GamepadProvider* provider() { return provider_.get(); }
-
  private:
   friend struct base::DefaultSingletonTraits<GamepadService>;
   friend class GamepadServiceTestConstructor;
@@ -90,11 +88,11 @@
 
   // Constructor for testing. This specifies the data fetcher to use for a
   // provider, bypassing the default platform one.
-  explicit GamepadService(scoped_ptr<GamepadDataFetcher> fetcher);
+  GamepadService(scoped_ptr<GamepadDataFetcher> fetcher);
 
   virtual ~GamepadService();
 
-  static void SetInstance(GamepadService* instance);
+  static void SetInstance(GamepadService*);
 
   void OnUserGesture();