Move device notification impl out of chrome/browser/media_gallery

chrome/browser/system_monitor/removable_device_notifications_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.
 
 // RemovableDeviceNotificationsLinux listens for mount point changes, notifies
 // the SystemMonitor about the addition and deletion of media devices, and
 // answers queries about mounted devices.
 
-#ifndef CHROME_BROWSER_MEDIA_GALLERY_REMOVABLE_DEVICE_NOTIFICATIONS_LINUX_H_
-#define CHROME_BROWSER_MEDIA_GALLERY_REMOVABLE_DEVICE_NOTIFICATIONS_LINUX_H_
+#ifndef CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_DEVICE_NOTIFICATIONS_LINUX_H_
+#define CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_DEVICE_NOTIFICATIONS_LINUX_H_
 
 #if defined(OS_CHROMEOS)
 #error "Use the ChromeOS-specific implementation instead."
 #endif
 
 #include <map>
 #include <set>
 #include <string>
 #include <utility>
 
@@ skipping 112 matching lines @@
   // notify about one of them. If (and only if) that one is unmounted, we need
   // to notify about it's departure and notify about another one of it's mount
   // points.
   MountPriorityMap mount_priority_map_;
 
   DISALLOW_COPY_AND_ASSIGN(RemovableDeviceNotificationsLinux);
 };
 
 }  // namespace chrome
 
-#endif  // CHROME_BROWSER_MEDIA_GALLERY_REMOVABLE_DEVICE_NOTIFICATIONS_LINUX_H_
+#endif  // CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_DEVICE_NOTIFICATIONS_LINUX_H_