drive: Introduce DriveSystemServiceObserver

chrome/browser/chromeos/drive/drive_file_system.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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_FILE_SYSTEM_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 48 matching lines @@
                   google_apis::DriveServiceInterface* drive_service,
                   DriveWebAppsRegistry* webapps_registry,
                   DriveResourceMetadata* resource_metadata,
                   base::SequencedTaskRunner* blocking_task_runner);
   virtual ~DriveFileSystem();
 
   // DriveFileSystem overrides.
   virtual void Initialize() OVERRIDE;
   virtual void AddObserver(DriveFileSystemObserver* observer) OVERRIDE;
   virtual void RemoveObserver(DriveFileSystemObserver* observer) OVERRIDE;
-  virtual void NotifyFileSystemMounted() OVERRIDE;
-  virtual void NotifyFileSystemToBeUnmounted() OVERRIDE;
   virtual void CheckForUpdates() OVERRIDE;
   virtual void GetEntryInfoByResourceId(
       const std::string& resource_id,
       const GetEntryInfoWithFilePathCallback& callback) OVERRIDE;
   virtual void Search(const std::string& search_query,
                       const GURL& next_feed,
                       const SearchCallback& callback) OVERRIDE;
   virtual void SearchMetadata(const std::string& query,
                               int options,
                               int at_most_num_matches,
@@ skipping 414 matching lines @@
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate the weak pointers before any other members are destroyed.
   base::WeakPtrFactory<DriveFileSystem> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DriveFileSystem);
 };
 
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_DRIVE_FILE_SYSTEM_H_