Add gamepad data fetcher for Linux

content/browser/gamepad/platform_data_fetcher_mac.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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_MAC_H_
 #define CONTENT_BROWSER_GAMEPAD_DATA_FETCHER_MAC_H_
 
 #include "build/build_config.h"
 
 #include "base/compiler_specific.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "content/browser/gamepad/data_fetcher.h"
 #include "content/common/gamepad_hardware_buffer.h"
 
 #include <CoreFoundation/CoreFoundation.h>
 #include <IOKit/hid/IOHIDManager.h>
 
 #if defined(__OBJC__)
 @class NSArray;
 #else
 class NSArray;
 #endif
 
 namespace content {
 
-class GamepadDataFetcherMac : public GamepadDataFetcher {
+class GamepadPlatformDataFetcherMac : public GamepadDataFetcher {
  public:
-  GamepadDataFetcherMac();
-  virtual ~GamepadDataFetcherMac();
+  GamepadPlatformDataFetcherMac();
+  virtual ~GamepadPlatformDataFetcherMac();
   virtual void GetGamepadData(WebKit::WebGamepads* pads,
                               bool devices_changed_hint) OVERRIDE;
   virtual void PauseHint(bool paused) OVERRIDE;
  private:
   bool enabled_;
   base::mac::ScopedCFTypeRef<IOHIDManagerRef> hid_manager_ref_;
 
-  static GamepadDataFetcherMac* InstanceFromContext(void* context);
+  static GamepadPlatformDataFetcherMac* InstanceFromContext(void* context);
   static void DeviceAddCallback(void* context,
                                 IOReturn result,
                                 void* sender,
                                 IOHIDDeviceRef ref);
   static void DeviceRemoveCallback(void* context,
                                    IOReturn result,
                                    void* sender,
                                    IOHIDDeviceRef ref);
   static void ValueChangedCallback(void* context,
                                    IOReturn result,
@@ skipping 18 matching lines @@
     IOHIDElementRef axis_elements[WebKit::WebGamepad::buttonsLengthCap];
     CFIndex axis_minimums[WebKit::WebGamepad::axesLengthCap];
     CFIndex axis_maximums[WebKit::WebGamepad::axesLengthCap];
   };
   AssociatedData associated_[WebKit::WebGamepads::itemsLengthCap];
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GAMEPAD_DATA_FETCHER_MAC_H_