Move gamepad_service out of content/ and into device/

device/gamepad/gamepad_shared_buffer.cc

+// 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.
+
+#include "device/gamepad/gamepad_shared_buffer.h"
+
+namespace device {
+
+GamepadSharedBuffer::GamepadSharedBuffer() {
+  size_t data_size = sizeof(GamepadHardwareBuffer);
+  bool res = shared_memory_.CreateAndMapAnonymous(data_size);
+  CHECK(res);
+
+  void* mem = shared_memory_.memory();
+  DCHECK(mem);
+  hardware_buffer_ = new (mem) GamepadHardwareBuffer();
+  memset(&(hardware_buffer_->data), 0, sizeof(blink::WebGamepads));
+}
+
+GamepadSharedBuffer::~GamepadSharedBuffer() {}
+
+base::SharedMemory* GamepadSharedBuffer::shared_memory() {
+  return &shared_memory_;
+}
+
+blink::WebGamepads* GamepadSharedBuffer::buffer() {
+  return &(hardware_buffer()->data);
+}
+
+GamepadHardwareBuffer* GamepadSharedBuffer::hardware_buffer() {
+  return hardware_buffer_;
+}
+
+void GamepadSharedBuffer::WriteBegin() {
+  hardware_buffer_->seqlock.WriteBegin();
+}
+
+void GamepadSharedBuffer::WriteEnd() {
+  hardware_buffer_->seqlock.WriteEnd();
+}
+
+}  // namespace device