Move OnFileSystemMounted/BeingUnmounted to VolumeManager.

chrome/browser/chromeos/extensions/file_manager/event_router.h

Index: chrome/browser/chromeos/extensions/file_manager/event_router.h
diff --git a/chrome/browser/chromeos/extensions/file_manager/event_router.h b/chrome/browser/chromeos/extensions/file_manager/event_router.h
index 9760b9f9758198418c42d72921c631c489154652..5f5eaeb33f1b2ce5eef383fc2eaf63a6b9971b31 100644
--- a/chrome/browser/chromeos/extensions/file_manager/event_router.h
+++ b/chrome/browser/chromeos/extensions/file_manager/event_router.h
@@ -40,7 +40,6 @@ class DesktopNotifications;
 // affecting File Manager. Dispatches appropriate File Browser events.
 class EventRouter
     : public chromeos::NetworkStateHandlerObserver,
-      public drive::DriveIntegrationServiceObserver,
       public drive::FileSystemObserver,
       public drive::JobListObserver,
       public drive::DriveServiceObserver,
@@ -92,11 +91,6 @@ class EventRouter
   virtual void OnDirectoryChanged(
       const base::FilePath& directory_path) OVERRIDE;
 
-  // drive::DriveIntegrationServiceObserver overrides.
-  // TODO(hidehiko): Move these to VolumeManager.
-  virtual void OnFileSystemMounted() OVERRIDE;
-  virtual void OnFileSystemBeingUnmounted() OVERRIDE;
-
   // VolumeManagerObserver overrides.
   virtual void OnDiskAdded(
       const chromeos::disks::DiskMountManager::Disk& disk,