If customization includes default wallpaper, download and apply it.

ash/desktop_background/desktop_background_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_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_CONTROLLER_H_
 #define ASH_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_CONTROLLER_H_
 
 #include "ash/ash_export.h"
 #include "ash/display/display_controller.h"
 #include "base/basictypes.h"
@@ skipping 117 matching lines @@
   // Returns true if the desktop moved.
   bool MoveDesktopToLockedContainer();
 
   // Move all desktop widgets to unlocked container.
   // Returns true if the desktop moved.
   bool MoveDesktopToUnlockedContainer();
 
   // Overrides DisplayController::Observer:
   virtual void OnDisplayConfigurationChanged() OVERRIDE;
 
+  // Use given files as default wallpaper.
+  void SetDefaultWallpaperPath(

[Daniel Erat, 2014/03/24 16:25:48]

nit: move this above the overridden method (also in .cc file)

[Alexander Alekseev, 2014/03/24 17:33:43]

Done.

+      const base::FilePath& customized_default_wallpaper_file_small,

[Daniel Erat, 2014/03/24 16:25:48]

nit: mind removing the word "customized" from these argument names? i'm worried
it might make it easy to confuse this with SetCustomWallpaper().

[Alexander Alekseev, 2014/03/24 17:33:43]

Done.

+      const base::FilePath& customized_default_wallpaper_file_large);
+
  private:
   friend class DesktopBackgroundControllerTest;
   FRIEND_TEST_ALL_PREFIXES(DesktopBackgroundControllerTest, GetMaxDisplaySize);
 
   // An operation to asynchronously loads wallpaper.
   class WallpaperLoader;
 
   // Returns true if the specified default wallpaper is already being
   // loaded by |wallpaper_loader_| or stored in |current_wallpaper_|.
+  // (i.e. no need to reload if exacltly duplicate request received)

[Daniel Erat, 2014/03/24 16:25:48]

nit: s/exacltly/exactly/

[Alexander Alekseev, 2014/03/24 17:33:43]

Done.

   bool DefaultWallpaperIsAlreadyLoadingOrLoaded(
       const base::FilePath& image_file, int image_resource_id) const;
 
+  // Returns true if the specified default wallpaper file is already being
+  // loaded |wallpaper_loader_| or stored in |current_wallpaper_|.
+  // (i.e. if current wallpaper is "default" and we need to replace the default
+  // wallpaper with another file, we need to initiate SetDefaultWallpaper() )
+  bool DefaultWallpaperFileIsAlreadyLoadingOrLoaded(
+      const base::FilePath& image_file) const;
+
   // Returns true if the specified custom wallpaper is already stored
   // in |current_wallpaper_|.
   bool CustomWallpaperIsAlreadyLoaded(const gfx::ImageSkia& image) const;
 
   // Creates view for all root windows, or notifies them to repaint if they
   // already exist.
   void SetDesktopBackgroundImageMode();
 
   // Creates a new background widget and sets the background mode to image mode.
   // Called after a default wallpaper has been loaded successfully.
@@ skipping 23 matching lines @@
   void set_wallpaper_reload_delay_for_test(bool value) {
     wallpaper_reload_delay_ = value;
   }
 
   // Returns the maximum size of all displays combined in native
   // resolutions.  Note that this isn't the bounds of the display who
   // has maximum resolutions. Instead, this returns the size of the
   // maximum width of all displays, and the maximum height of all displays.
   static gfx::Size GetMaxDisplaySizeInNative();
 
+  // SetDefaultWallpaper using given path and mode.
+  bool DoSetDefaultWallpaper(const base::FilePath& file_path,
+                             const bool use_large);
+
+  // Before setting first wallpaper we need to check and probably apply
+  // device customization.
+  void CheckForCustomization();
+
   // If non-NULL, used in place of the real command line.
   base::CommandLine* command_line_for_testing_;
 
   // Can change at runtime.
   bool locked_;
 
   BackgroundMode desktop_background_mode_;
 
   SkColor background_color_;
 
@@ skipping 12 matching lines @@
 
   // Loads default wallpaper from disk.
   scoped_refptr<WallpaperLoader> default_wallpaper_loader_;
 
   base::WeakPtrFactory<DesktopBackgroundController> weak_ptr_factory_;
 
   base::OneShotTimer<DesktopBackgroundController> timer_;
 
   int wallpaper_reload_delay_;
 
+  base::FilePath customized_default_wallpaper_file_small_;
+  base::FilePath customized_default_wallpaper_file_large_;
+
+  bool customization_applied_;
+
   DISALLOW_COPY_AND_ASSIGN(DesktopBackgroundController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_CONTROLLER_H_