Add a receiver interface to RemovableStorageNotifications.

chrome/browser/media_gallery/media_file_system_registry_unittest.cc

 // 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.
 
 // MediaFileSystemRegistry unit tests.
 
 #include <algorithm>
 #include <set>
 
 #include "base/command_line.h"
@@ skipping 344 matching lines @@
                            const FilePath& location,
                            bool removable,
                            bool media_device);
 
   std::vector<MediaFileSystemInfo> GetAutoAddedGalleries(
       ProfileState* profile_state);
 
   void ProcessAttach(const std::string& id,
                      const string16& name,
                      const FilePath::StringType& location) {
-    RemovableStorageNotifications::GetInstance()->ProcessAttach(
-        id, name, location);
+    notifications_.ProcessAttach(id, name, location);
   }
 
   void ProcessDetach(const std::string& id) {
-    RemovableStorageNotifications::GetInstance()->ProcessDetach(id);
+    notifications_.ProcessDetach(id);
   }
 
  protected:
   virtual void SetUp() OVERRIDE;
   virtual void TearDown() OVERRIDE;
 
  private:
   // This makes sure that at least one default gallery exists on the file
   // system.
   EnsureMediaDirectoriesExists media_directories_;
@@ skipping 538 matching lines @@
   ProfileState* profile_state = GetProfileState(0U);
   SetGalleryPermission(profile_state,
                        profile_state->all_permission_extension(),
                        device_id,
                        true /*has access*/);
   CheckNewGalleryInfo(profile_state, galleries_info, empty_dir(),
                       false /*removable*/, false /* media device */);
 }
 
 }  // namespace chrome