arc: Rename methods in ArcSessionManager::Observer.

chrome/browser/ui/ash/launcher/arc_app_deferred_launcher_controller.h

 // Copyright 2016 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_UI_ASH_LAUNCHER_ARC_APP_DEFERRED_LAUNCHER_CONTROLLER_H_
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_ARC_APP_DEFERRED_LAUNCHER_CONTROLLER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 29 matching lines @@
 
   // Applies spinning effect if requested app is handled by deferred controller.
   void MaybeApplySpinningEffect(const std::string& app_id,
                                 gfx::ImageSkia* image);
 
   // ArcAppListPrefs::Observer:
   void OnAppReadyChanged(const std::string& app_id, bool ready) override;
   void OnAppRemoved(const std::string& app_id) override;
 
   // arc::ArcSessionManager::Observer:
-  void OnOptInEnabled(bool enabled) override;
+  void OnArcOptInChanged(bool enabled) override;
 
   // Removes entry from the list of tracking items.
   void Remove(const std::string& app_id);
 
   // Closes Shelf item if it has ArcAppDeferredLauncherItemController controller
   // and removes entry from the list of tracking items.
   void Close(const std::string& app_id);
 
  private:
   // Defines mapping of a shelf app id to a corresponded controller. Shelf app
@@ skipping 10 matching lines @@
 
   AppControllerMap app_controller_map_;
 
   // Always keep this the last member of this class.
   base::WeakPtrFactory<ArcAppDeferredLauncherController> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcAppDeferredLauncherController);
 };
 
 #endif  // CHROME_BROWSER_UI_ASH_LAUNCHER_ARC_APP_DEFERRED_LAUNCHER_CONTROLLER_H_