[ash-md] WIP Added wallpaper color caching.

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"
 #include "ash/common/shell_observer.h"
 #include "ash/common/wm_display_observer.h"
 #include "ash/public/interfaces/wallpaper.mojom.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
 #include "base/timer/timer.h"
 #include "components/wallpaper/wallpaper_color_calculator_observer.h"
 #include "components/wallpaper/wallpaper_layout.h"
 #include "components/wallpaper/wallpaper_resizer_observer.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "ui/gfx/color_analysis.h"
 #include "ui/gfx/image/image_skia.h"
-
 namespace base {
 class TaskRunner;
 }
 
 namespace wallpaper {
+class WallpaperColorCache;
 class WallpaperColorCalculator;
 class WallpaperResizer;
 }
 
 namespace ash {
 
 class WallpaperControllerObserver;
 
 // Controls the desktop background wallpaper.
 class ASH_EXPORT WallpaperController
@@ skipping 64 matching lines @@
                                 bool compare_layouts,
                                 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();
 
+  // TODO(bruthig) Document me.
+  void SetWallpaperColorCache(wallpaper::WallpaperColorCache* color_cache);
+
   // mojom::WallpaperController overrides:
   void SetWallpaperPicker(mojom::WallpaperPickerPtr picker) override;
+  // TODO(bruthig): Add an std::string |image_id| field.
   void SetWallpaper(const SkBitmap& wallpaper,
                     wallpaper::WallpaperLayout layout) override;
 
   // WallpaperResizerObserver:
   void OnWallpaperResized() override;
 
   // WallpaperColorCalculatorObserver:
   void OnColorCalculationComplete() override;
 
  private:
@@ skipping 37 matching lines @@
   // Bindings for the WallpaperController interface.
   mojo::BindingSet<mojom::WallpaperController> bindings_;
 
   base::ObserverList<WallpaperControllerObserver> observers_;
 
   std::unique_ptr<wallpaper::WallpaperResizer> current_wallpaper_;
 
   // Asynchronous task to extract colors from the wallpaper.
   std::unique_ptr<wallpaper::WallpaperColorCalculator> color_calculator_;
 
+  // TODO(bruthig) Document me.
+  wallpaper::WallpaperColorCache* color_cache_;
+
   // The prominent color extracted from the current wallpaper.
   // SK_ColorTRANSPARENT is used by default or if extracting colors fails.
   SkColor prominent_color_;
 
   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_