Added support for GameController devices on OSX

device/gamepad/game_controller_data_fetcher_mac.h

+// 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.
+
+#ifndef DEVICE_GAMEPAD_GAME_CONTROLLER_DATA_FETCHER_MAC_H_
+#define DEVICE_GAMEPAD_GAME_CONTROLLER_DATA_FETCHER_MAC_H_
+
+#include "base/macros.h"
+#include "device/gamepad/gamepad_data_fetcher.h"
+
+#if defined(__OBJC__)
+@class NSArray;
+#else
+class NSArray;
+#endif
+
+namespace device {
+
+class GameControllerDataFetcherMac : public GamepadDataFetcher {
+ public:
+  typedef GamepadDataFetcherFactoryImpl<GameControllerDataFetcherMac,
+                                        GAMEPAD_SOURCE_MAC_GC>
+      Factory;
+
+  GameControllerDataFetcherMac();
+  ~GameControllerDataFetcherMac() override;
+
+  GamepadSource source() override;
+
+  void GetGamepadData(bool devices_changed_hint) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(GameControllerDataFetcherMac);
+};
+
+}  // namespace device
+
+#endif  // DEVICE_GAMEPAD_GAMEPAD_PLATFORM_DATA_FETCHER_MAC_H_