cheets: implement cros side of WallpaperManagerService.

components/arc/arc_bridge_service.h

 // Copyright 2015 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 COMPONENTS_ARC_ARC_BRIDGE_SERVICE_H_
 #define COMPONENTS_ARC_ARC_BRIDGE_SERVICE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 102 matching lines @@
   }
   InstanceHolder<mojom::PolicyInstance>* policy() { return &policy_; }
   InstanceHolder<mojom::PowerInstance>* power() { return &power_; }
   InstanceHolder<mojom::PrintInstance>* print() { return &print_; }
   InstanceHolder<mojom::ProcessInstance>* process() { return &process_; }
   InstanceHolder<mojom::StorageManagerInstance>* storage_manager() {
     return &storage_manager_;
   }
   InstanceHolder<mojom::TtsInstance>* tts() { return &tts_; }
   InstanceHolder<mojom::VideoInstance>* video() { return &video_; }
+  InstanceHolder<mojom::WallpaperInstance>* wallpaper() { return &wallpaper_; }
 
   // Gets if ARC is currently running.
   bool ready() const { return state() == State::READY; }
 
   // Gets if ARC is currently stopped. This is not exactly !ready() since there
   // are transient states between ready() and stopped().
   bool stopped() const { return state() == State::STOPPED; }
 
  protected:
   // The possible states of the bridge.  In the normal flow, the state changes
@@ skipping 48 matching lines @@
   InstanceHolder<mojom::NetInstance> net_;
   InstanceHolder<mojom::NotificationsInstance> notifications_;
   InstanceHolder<mojom::ObbMounterInstance> obb_mounter_;
   InstanceHolder<mojom::PolicyInstance> policy_;
   InstanceHolder<mojom::PowerInstance> power_;
   InstanceHolder<mojom::PrintInstance> print_;
   InstanceHolder<mojom::ProcessInstance> process_;
   InstanceHolder<mojom::StorageManagerInstance> storage_manager_;
   InstanceHolder<mojom::TtsInstance> tts_;
   InstanceHolder<mojom::VideoInstance> video_;
+  InstanceHolder<mojom::WallpaperInstance> wallpaper_;
 
   // Gets the current state of the bridge service.
   State state() const { return state_; }
 
   // Changes the current state and notifies all observers.
   void SetState(State state);
 
   // Sets the reason the bridge is stopped. This function must be always called
   // before SetState(State::STOPPED) to report a correct reason with
   // Observer::OnBridgeStopped().
@@ skipping 23 matching lines @@
 
   // WeakPtrFactory to use callbacks.
   base::WeakPtrFactory<ArcBridgeService> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcBridgeService);
 };
 
 }  // namespace arc
 
 #endif  // COMPONENTS_ARC_ARC_BRIDGE_SERVICE_H_