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

chrome/browser/storage_monitor/mock_removable_storage_observer.cc

 // 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.
 
 #include "chrome/browser/storage_monitor/mock_removable_storage_observer.h"
 
-namespace chrome {
-
 MockRemovableStorageObserver::MockRemovableStorageObserver()
     : attach_calls_(0), detach_calls_(0) {
 }
 
 MockRemovableStorageObserver::~MockRemovableStorageObserver() {
 }
 
 void MockRemovableStorageObserver::OnRemovableStorageAttached(
     const StorageInfo& info) {
   attach_calls_++;
   last_attached_ = info;
 }
 
 void MockRemovableStorageObserver::OnRemovableStorageDetached(
     const StorageInfo& info) {
   detach_calls_++;
   last_detached_ = info;
 }
-
-}  // namespace chrome