If customization includes default wallpaper, download and apply it.

chrome/browser/chromeos/customization_document.h

Index: chrome/browser/chromeos/customization_document.h
diff --git a/chrome/browser/chromeos/customization_document.h b/chrome/browser/chromeos/customization_document.h
index 95885fc9439d3f3996a4f40ac9bca19483d77fc1..8a0066cda9b1c7448a9c2855a0fb47f1b9d5b684 100644
--- a/chrome/browser/chromeos/customization_document.h
+++ b/chrome/browser/chromeos/customization_document.h
@@ -43,6 +43,7 @@ void Test__InitStartupCustomizationDocument(const std::string& manifest);
 namespace chromeos {
 
 class ServicesCustomizationExternalLoader;
+class CustomizationWallpaperDownloader;
 
 namespace system {
 class StatisticsProvider;
@@ -177,8 +178,14 @@ class ServicesCustomizationDocument : public CustomizationDocument,
     network_delay_ = base::TimeDelta();
   }
 
+  // This is also used by Wallpaper manager to set customized wallpaper path

[Daniel Erat, 2014/03/25 21:58:29]

nit: s/Wallpaper manager/WallpaperManager/

[Alexander Alekseev, 2014/03/27 00:28:37]

Done.

+  // to global default before first wallpaper was shown.

[Daniel Erat, 2014/03/25 21:58:29]

nit: s/was/is/

[Alexander Alekseev, 2014/03/27 00:28:37]

Done.

+  static base::FilePath GetCustomizedWallpaperCacheDir();
+  static base::FilePath GetCustomizedWallpaperDownloadedFileName();
+
  private:
   friend struct DefaultSingletonTraits<ServicesCustomizationDocument>;
+  friend class CustomizationWallpaperDownloader;
 
   typedef std::vector<base::WeakPtr<ServicesCustomizationExternalLoader> >
       ExternalLoaders;
@@ -235,6 +242,24 @@ class ServicesCustomizationDocument : public CustomizationDocument,
       const std::string& locale,
       const base::DictionaryValue& root) const;
 
+  // Set Shell default wallpaper to customized.
+  static void SetDefaultWallpaperPath(const GURL& wallpaper_url);
+
+  // This is called by CustomizationWallpaperDownloader to destroy self.
+  static void DestroyWallpaperDownloader();
+
+  // Start download of wallpaper image if need.
+  void StartOEMWallpaperDownload(const GURL& wallpaper_url);
+
+  // Check downloaded wallpaper and start download if needed.
+  void CheckAndApplyWallpaper();
+
+  // Intermediate function to pass the result of PathExists to ApplyWallpaper.
+  void OnCheckedWallpaperCacheExists(scoped_ptr<bool>);
+
+  // Called after downloaded wallpaper has been checked.
+  void ApplyWallpaper(bool default_wallpaper_file_exists);
+
   // Services customization manifest URL.
   GURL url_;
 
@@ -256,6 +281,8 @@ class ServicesCustomizationDocument : public CustomizationDocument,
   // Weak factory for callbacks.
   base::WeakPtrFactory<ServicesCustomizationDocument> weak_ptr_factory_;
 
+  scoped_ptr<CustomizationWallpaperDownloader> wallpaper_downloader_;
+
   DISALLOW_COPY_AND_ASSIGN(ServicesCustomizationDocument);
 };