cheets: implement cros side of WallpaperManagerService.

components/arc/intent_helper/arc_intent_helper_bridge.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 COMPONENTS_ARC_INTENT_HELPER_ARC_INTENT_HELPER_BRIDGE_H_
 #define COMPONENTS_ARC_INTENT_HELPER_ARC_INTENT_HELPER_BRIDGE_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 22 matching lines @@
 // Receives intents from ARC.
 class ArcIntentHelperBridge
     : public ArcService,
       public InstanceHolder<mojom::IntentHelperInstance>::Observer,
       public mojom::IntentHelperHost,
       public ash::LinkHandlerModelFactory {
  public:
   ArcIntentHelperBridge(
       ArcBridgeService* bridge_service,
       const scoped_refptr<ActivityIconLoader>& icon_loader,
-      std::unique_ptr<SetWallpaperDelegate> set_wallpaper_delegate,
+      SetWallpaperDelegate* set_wallpaper_delegate,
       const scoped_refptr<LocalActivityResolver>& activity_resolver);
   ~ArcIntentHelperBridge() override;
 
   // InstanceHolder<mojom::IntentHelperInstance>::Observer
   void OnInstanceReady() override;
   void OnInstanceClosed() override;
 
   // arc::mojom::IntentHelperHost
   void OnIconInvalidated(const mojo::String& package_name) override;
   void OnIntentFiltersUpdated(
@@ skipping 10 matching lines @@
   static bool IsIntentHelperPackage(const std::string& package_name);
 
   // Filters out handlers that belong to the intent_helper apk and returns
   // a new array.
   static mojo::Array<mojom::UrlHandlerInfoPtr> FilterOutIntentHelper(
       mojo::Array<mojom::UrlHandlerInfoPtr> handlers);
 
  private:
   mojo::Binding<mojom::IntentHelperHost> binding_;
   scoped_refptr<ActivityIconLoader> icon_loader_;
-  std::unique_ptr<SetWallpaperDelegate> set_wallpaper_delegate_;
+  SetWallpaperDelegate* set_wallpaper_delegate_;

[xiyuan, 2016/08/23 20:43:47]

nit: SetWallpaperDelegate* const set_wallpaper_delegate_;

if |set_wallpaper_delegate_| never changes during lifetime of this class.

[Muyuan, 2016/08/23 21:20:38]

Done.

   scoped_refptr<LocalActivityResolver> activity_resolver_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcIntentHelperBridge);
 };
 
 }  // namespace arc
 
 #endif  // COMPONENTS_ARC_INTENT_HELPER_ARC_INTENT_HELPER_BRIDGE_H_