Move gamepad_service out of content/ and into device/

content/common/gamepad_hardware_buffer.h

-// Copyright (c) 2011 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_COMMON_GAMEPAD_HARDWARE_BUFFER_H_
-#define CONTENT_COMMON_GAMEPAD_HARDWARE_BUFFER_H_
-
-#include "device/base/synchronization/one_writer_seqlock.h"
-#include "third_party/WebKit/public/platform/WebGamepads.h"
-
-namespace content {
-
-/*
-
-This structure is stored in shared memory that's shared between the browser
-which does the hardware polling, and the various consumers of the gamepad
-state (renderers and NaCl plugins). The performance characteristics are that
-we want low latency (so would like to avoid explicit communication via IPC
-between producer and consumer) and relatively large data size.
-
-Writer and reader operate on the same buffer assuming contention is low, and
-contention is detected by using the associated SeqLock.
-
-*/
-
-struct GamepadHardwareBuffer {
-  // FIXME: Use the generic SharedMemorySeqLockBuffer<blink::WebGamepads>.
-  device::OneWriterSeqLock sequence;
-  blink::WebGamepads buffer;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_COMMON_GAMEPAD_HARDWARE_BUFFER_H_