mash: Have chrome set itself as the wallpaper picker.

ash/common/wallpaper/wallpaper_controller.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 ASH_COMMON_WALLPAPER_WALLPAPER_CONTROLLER_H_
 #define ASH_COMMON_WALLPAPER_WALLPAPER_CONTROLLER_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
@@ skipping 38 matching lines @@
   // Add/Remove observers.
   void AddObserver(WallpaperControllerObserver* observer);
   void RemoveObserver(WallpaperControllerObserver* observer);
 
   // Provides current image on the wallpaper, or empty gfx::ImageSkia if there
   // is no image, e.g. wallpaper is none.
   gfx::ImageSkia GetWallpaper() const;
 
   wallpaper::WallpaperLayout GetWallpaperLayout() const;
 
-  // Sets wallpaper. This is mostly called by WallpaperManager to set
-  // the default or user selected custom wallpaper.
-  // Returns true if new image was actually set. And false when duplicate set
-  // request detected.
-  bool SetWallpaperImage(const gfx::ImageSkia& image,
+  // Sets the wallpaper and alerts observers of changes.
+  void SetWallpaperImage(const gfx::ImageSkia& image,
                          wallpaper::WallpaperLayout layout);
 
   // Creates an empty wallpaper. Some tests require a wallpaper widget is ready
   // when running. However, the wallpaper widgets are now created
   // asynchronously. If loading a real wallpaper, there are cases that these
   // tests crash because the required widget is not ready. This function
   // synchronously creates an empty widget for those tests to prevent
   // crashes. An example test is SystemGestureEventFilterTest.ThreeFingerSwipe.
   void CreateEmptyWallpaper();
 
@@ skipping 25 matching lines @@
                                 wallpaper::WallpaperLayout layout) const;
 
   void set_wallpaper_reload_delay_for_test(int value) {
     wallpaper_reload_delay_ = value;
   }
 
   // Opens the set wallpaper page in the browser.
   void OpenSetWallpaperPage();
 
   // mojom::WallpaperController overrides:
+  void SetWallpaperPicker(mojom::WallpaperPickerPtr picker) override;
   void SetWallpaper(const SkBitmap& wallpaper,
                     wallpaper::WallpaperLayout layout) override;
 
  private:
   // Creates a WallpaperWidgetController for |root_window|.
   void InstallDesktopController(WmWindow* root_window);
 
   // Creates a WallpaperWidgetController for all root windows.
   void InstallDesktopControllerForAllWindows();
 
   // Moves the wallpaper to the specified container across all root windows.
   // Returns true if a wallpaper moved.
   bool ReparentWallpaper(int container);
 
   // Returns the wallpaper container id for unlocked and locked states.
   int GetWallpaperContainerId(bool locked);
 
   // Reload the wallpaper. |clear_cache| specifies whether to clear the
   // wallpaper cahce or not.
   void UpdateWallpaper(bool clear_cache);
 
   bool locked_;
 
   WallpaperMode wallpaper_mode_;
 
+  // Wallpaper picker interface in chrome browser, used to open the picker.
+  mojom::WallpaperPickerPtr wallpaper_picker_;
+
   // Bindings for the WallpaperController interface.
   mojo::BindingSet<mojom::WallpaperController> bindings_;
 
   base::ObserverList<WallpaperControllerObserver> observers_;
 
   std::unique_ptr<wallpaper::WallpaperResizer> current_wallpaper_;
 
   gfx::Size current_max_display_size_;
 
   base::OneShotTimer timer_;
 
   int wallpaper_reload_delay_;
 
   scoped_refptr<base::TaskRunner> task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(WallpaperController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_WALLPAPER_WALLPAPER_CONTROLLER_H_