Move all wallpaper file loading and decoding from DesktopBackgroundController to WallpaperManager.

chrome/browser/ui/ash/user_wallpaper_delegate_win.cc

 // Copyright (c) 2013 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.
 
 #include "ash/desktop_background/user_wallpaper_delegate.h"
 
 #include "ash/desktop_background/desktop_background_controller.h"
 #include "ash/shell.h"
 #include "ash/wm/window_animations.h"
 #include "base/basictypes.h"
@@ skipping 40 matching lines @@
     bitmap.eraseARGB(255, kBackgroundRed, kBackgroundGreen, kBackgroundBlue);
 #if !defined(NDEBUG)
     // In debug builds we generate a simple pattern that allows visually
     // notice if transparency is broken.
     {
       SkAutoLockPixels alp(bitmap);
       *bitmap.getAddr32(0,0) = SkColorSetRGB(0, 0, 0);
     }
 #endif
     gfx::ImageSkia wallpaper = gfx::ImageSkia::CreateFrom1xBitmap(bitmap);
-    ash::Shell::GetInstance()->desktop_background_controller()->
-        SetCustomWallpaper(wallpaper, ash::WALLPAPER_LAYOUT_TILE);
+    ash::Shell::GetInstance()
+        ->desktop_background_controller()
+        ->SetWallpaperImage(wallpaper, ash::WALLPAPER_LAYOUT_TILE);
   }
 
   virtual void InitializeWallpaper() OVERRIDE {
     UpdateWallpaper(false);
   }
 
   virtual void OpenSetWallpaperPage() OVERRIDE {
   }
 
   virtual bool CanOpenSetWallpaperPage() OVERRIDE {
     return false;
   }
 
   virtual void OnWallpaperAnimationFinished() OVERRIDE {
   }
 
   virtual void OnWallpaperBootAnimationFinished() OVERRIDE {
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(UserWallpaperDelegate);
 };
 
 }  // namespace
 
 ash::UserWallpaperDelegate* CreateUserWallpaperDelegate() {
   return new UserWallpaperDelegate();
 }