Move device notification impl out of chrome/browser/media_gallery

chrome/browser/system_monitor/media_device_notifications_chromeos.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.
 
 // chromeos::MediaDeviceNotifications listens for mount point changes and
 // notifies the SystemMonitor about the addition and deletion of media devices.
 
-#ifndef CHROME_BROWSER_MEDIA_GALLERY_MEDIA_DEVICE_NOTIFICATIONS_CHROMEOS_H_
-#define CHROME_BROWSER_MEDIA_GALLERY_MEDIA_DEVICE_NOTIFICATIONS_CHROMEOS_H_
+#ifndef CHROME_BROWSER_SYSTEM_MONITOR_MEDIA_DEVICE_NOTIFICATIONS_CHROMEOS_H_
+#define CHROME_BROWSER_SYSTEM_MONITOR_MEDIA_DEVICE_NOTIFICATIONS_CHROMEOS_H_
 
 #if !defined(OS_CHROMEOS)
 #error "Should only be used on ChromeOS."
 #endif
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 43 matching lines @@
 
   // Mapping of relevant mount points and their corresponding mount devices.
   // Only accessed on the UI thread.
   MountMap mount_map_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaDeviceNotifications);
 };
 
 }  // namespace chromeos
 
-#endif  // CHROME_BROWSER_MEDIA_GALLERY_MEDIA_DEVICE_NOTIFICATIONS_CHROMEOS_H_
+#endif  // CHROME_BROWSER_SYSTEM_MONITOR_MEDIA_DEVICE_NOTIFICATIONS_CHROMEOS_H_