Cleanup: Remove chrome namespace for storage monitor and media galleries.

chrome/browser/storage_monitor/removable_storage_observer.h

 // Copyright (c) 2013 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 CHROME_BROWSER_STORAGE_MONITOR_REMOVABLE_STORAGE_OBSERVER_H_
 #define CHROME_BROWSER_STORAGE_MONITOR_REMOVABLE_STORAGE_OBSERVER_H_
 
 #include "chrome/browser/storage_monitor/storage_info.h"
 
-namespace chrome {
-
 // Clients use this class to register for event-based notifications of
 // removable storage devices attached to or removed from the system.
 class RemovableStorageObserver {
  public:
   // When a removable storage device is attached, this
   // event is triggered.
   virtual void OnRemovableStorageAttached(const StorageInfo& info) {}
 
   // When a removable storage device is detached, this
   // event is triggered.
   virtual void OnRemovableStorageDetached(const StorageInfo& info) {}
 
  protected:
   virtual ~RemovableStorageObserver() {}
 };
 
-}  // namespace chrome
-
 #endif  // CHROME_BROWSER_STORAGE_MONITOR_REMOVABLE_STORAGE_OBSERVER_H_