Add gamepad data fetcher for Linux

content/browser/gamepad/data_fetcher_win.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_BROWSER_GAMEPAD_DATA_FETCHER_WIN_H_
-#define CONTENT_BROWSER_GAMEPAD_DATA_FETCHER_WIN_H_
-
-#include "build/build_config.h"
-
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN
-#endif
-#include <windows.h>
-#include <XInput.h>
-
-#include "base/compiler_specific.h"
-#include "content/browser/gamepad/data_fetcher.h"
-
-namespace content {
-
-class GamepadDataFetcherWindows : public GamepadDataFetcher {
- public:
-  GamepadDataFetcherWindows();
-  virtual void GetGamepadData(WebKit::WebGamepads* pads,
-                              bool devices_changed_hint) OVERRIDE;
- private:
-  bool xinput_available_;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_GAMEPAD_DATA_FETCHER_WIN_H_