Revert 116724 - Add gamepad data fetcher for Linux

content/browser/gamepad/platform_data_fetcher_linux.h

-// Copyright (c) 2012 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_LINUX_H_
-#define CONTENT_BROWSER_GAMEPAD_DATA_FETCHER_LINUX_H_
-
-#include <string>
-
-#include "base/compiler_specific.h"
-#include "base/message_pump_libevent.h"
-#include "build/build_config.h"
-#include "content/browser/gamepad/data_fetcher.h"
-#include "content/browser/gamepad/gamepad_standard_mappings_linux.h"
-#include "content/common/gamepad_hardware_buffer.h"
-
-extern "C" {
-struct udev;
-struct udev_device;
-struct udev_monitor;
-}
-
-namespace content {
-
-class GamepadPlatformDataFetcherLinux :
-    public GamepadDataFetcher,
-    public base::MessagePumpLibevent::Watcher {
- public:
-  GamepadPlatformDataFetcherLinux();
-  virtual ~GamepadPlatformDataFetcherLinux();
-
-  // GamepadDataFetcher:
-  virtual void GetGamepadData(WebKit::WebGamepads* pads,
-                              bool devices_changed_hint) OVERRIDE;
-
-  // base::MessagePump:Libevent::Watcher:
-  virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE;
-  virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE;
-
- private:
-  bool IsGamepad(udev_device* dev, int& index, std::string& path);
-  void RefreshDevice(udev_device* dev);
-  void EnumerateDevices();
-  void ReadDeviceData(size_t index);
-
-  // libudev-related items, the main context, and the monitoring context to be
-  // notified about changes to device states.
-  udev* udev_;
-  udev_monitor* monitor_;
-  int monitor_fd_;
-  base::MessagePumpLibevent::FileDescriptorWatcher monitor_watcher_;
-
-  // File descriptors for the /dev/input/js* devices. -1 if not in use.
-  int device_fds_[WebKit::WebGamepads::itemsLengthCap];
-
-  // Functions to map from device data to standard layout, if available. May
-  // be null if no mapping is available.
-  GamepadStandardMappingFunction mappers_[WebKit::WebGamepads::itemsLengthCap];
-
-  // Data that's returned to the consumer.
-  WebKit::WebGamepads data_;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_GAMEPAD_DATA_FETCHER_LINUX_H_