Apply default wallpaper from customization manifest.

chrome/browser/chromeos/login/user_image_loader.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_USER_IMAGE_LOADER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USER_IMAGE_LOADER_H_
 
 #include <map>
 #include <string>
 
@@ skipping 35 matching lines @@
              const LoadedCallback& loaded_cb);
   void Start(scoped_ptr<std::string> data,
              int size,
              const LoadedCallback& loaded_cb);
 
  private:
   friend class base::RefCountedThreadSafe<UserImageLoader>;
 
   // Contains attributes we need to know about each image we decode.
   struct ImageInfo {
-    ImageInfo(int size, const LoadedCallback& loaded_cb);
+    ImageInfo(const std::string& file_path,
+              int size,

[Daniel Erat, 2014/04/15 03:06:30]

how about renaming this to something that's clearer like |dimension| or
|pixels_per_side|?

[Alexander Alekseev, 2014/04/15 22:47:31]

Done.

+              const LoadedCallback& loaded_cb);
     ~ImageInfo();
 
+    const std::string file_path;
     const int size;
     const LoadedCallback loaded_cb;
   };
 
   typedef std::map<const ImageDecoder*, ImageInfo> ImageInfoMap;
 
   virtual ~UserImageLoader();
 
-  // Reads the image from |filepath| and starts the decoding process. This
-  // method may only be invoked via the |background_task_runner_|.
-  void ReadAndDecodeImage(const std::string& filepath,
-                          const ImageInfo& image_info);
+  // Reads the image from |image_info.file_path| and starts the decoding
+  // process. This method may only be invoked via the |background_task_runner_|.
+  void ReadAndDecodeImage(const ImageInfo& image_info);
 
   // Decodes the image |data|. This method may only be invoked via the
   // |background_task_runner_|.
   void DecodeImage(const scoped_ptr<std::string> data,
                    const ImageInfo& image_info);
 
   // ImageDecoder::Delegate implementation. These callbacks will only be invoked
   // via the |background_task_runner_|.
   virtual void OnImageDecoded(const ImageDecoder* decoder,
                               const SkBitmap& decoded_image) OVERRIDE;
@@ skipping 13 matching lines @@
   // Holds information about the images currently being decoded. Accessed via
   // |background_task_runner_| only.
   ImageInfoMap image_info_map_;
 
   DISALLOW_COPY_AND_ASSIGN(UserImageLoader);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USER_IMAGE_LOADER_H_