Move gamepad_service out of content/ and into device/

device/gamepad/public/interfaces/gamepad.mojom

 // Copyright 2016 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.
 
 module device.mojom;
 
 struct GamepadQuaternion {
   float x;
   float y;
   float z;
@@ skipping 39 matching lines @@
   uint32 display_id;
 };
 
 interface GamepadObserver {
   GamepadConnected(int32 index, Gamepad gamepad);
   GamepadDisconnected(int32 index, Gamepad gamepad);
 };
 
 // Asks the browser process to start polling, and return a shared memory
 // handle that will hold the data from the hardware. See
-// gamepad_hardware_buffer.h for a description of how synchronization is
+// gamepad_shared_buffer.h for a description of how synchronization is
 // handled. The number of Starts should match the number of Stops.
 interface GamepadMonitor {
   [Sync]
   GamepadStartPolling() => (handle<shared_buffer> memory_handle);
 
   [Sync]
   GamepadStopPolling() => ();
 
   SetObserver(GamepadObserver gamepad_observer);
 };