Apply default wallpaper from customization manifest.

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 1c0ea8fcea6290bae9a6409e71e68219474bb138..fdfa3bb6f429ed6a2083617deb899a250b848a32 100644
--- a/chrome/browser/chromeos/customization_document.h
+++ b/chrome/browser/chromeos/customization_document.h
@@ -42,6 +42,7 @@ void Test__InitStartupCustomizationDocument(const std::string& manifest);
 
 namespace chromeos {
 
+class CustomizationWallpaperDownloader;
 class ServicesCustomizationExternalLoader;
 
 namespace system {
@@ -179,6 +180,12 @@ class ServicesCustomizationDocument : public CustomizationDocument,
   // Remove instance of ServicesCustomizationDocument for tests.
   static void ShutdownForTesting();
 
+  // These methods are also called by WallpaperManager to get "global default"
+  // customized wallpaper path (and to init default wallpaper path from it)
+  // before first wallpaper is shown.
+  static base::FilePath GetCustomizedWallpaperCacheDir();
+  static base::FilePath GetCustomizedWallpaperDownloadedFileName();
+
  private:
   friend struct DefaultSingletonTraits<ServicesCustomizationDocument>;
 
@@ -237,6 +244,24 @@ class ServicesCustomizationDocument : public CustomizationDocument,
       const std::string& locale,
       const base::DictionaryValue& root) const;
 
+  // Start download of wallpaper image if needed.
+  void StartOEMWallpaperDownload(const GURL& wallpaper_url);
+
+  // Check that current customized wallpaper cache exists and matches manifest.
+  // Start wallpaper download if needed.
+  void CheckAndApplyWallpaper();
+
+  // Intermediate function to pass the result of PathExists to ApplyWallpaper.
+  void OnCheckedWallpaperCacheExists(scoped_ptr<bool> exists);
+
+  // Called after downloaded wallpaper has been checked.
+  void ApplyWallpaper(bool default_wallpaper_file_exists);
+
+  // Set Shell default wallpaper to customized.
+  // It's wrapped as a callback and passed as a parameter to
+  // CustomizationWallpaperDownloader.
+  void OnOEMWallpaperDownloaded(bool success, const GURL& wallpaper_url);
+
   // Services customization manifest URL.
   GURL url_;
 
@@ -255,6 +280,8 @@ class ServicesCustomizationDocument : public CustomizationDocument,
   // Known external loaders.
   ExternalLoaders external_loaders_;
 
+  scoped_ptr<CustomizationWallpaperDownloader> wallpaper_downloader_;
+
   // Weak factory for callbacks.
   base::WeakPtrFactory<ServicesCustomizationDocument> weak_ptr_factory_;