Add browser test for CustomizationWallpaperDownloader.

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 97e166d82e193595447546e15faebff133f52f7b..5b37793f80e8350922bd85521f1dedcc24604226 100644
--- a/chrome/browser/chromeos/customization_document.h
+++ b/chrome/browser/chromeos/customization_document.h
@@ -194,8 +194,15 @@ class ServicesCustomizationDocument : public CustomizationDocument,
   static base::FilePath GetCustomizedWallpaperCacheDir();
   static base::FilePath GetCustomizedWallpaperDownloadedFileName();
 
+  // For testing

[Daniel Erat, 2014/05/05 14:17:29]

delete unnecessary comment

[Alexander Alekseev, 2014/05/06 19:04:17]

Done.

+  CustomizationWallpaperDownloader* GetWallpaperDownloaderForTesting() const;

[Daniel Erat, 2014/05/05 14:17:29]

i think it's fine to inline this and make it into an accessor:

  CustomizationWallpaperDownloader* wallpaper_downloader_for_testing() {
    return wallpaper_downloader_.get();
  }

also, make it non-const since it returns a non-const pointer to a member.

[Alexander Alekseev, 2014/05/06 19:04:17]

Done.

+
  private:
   friend struct DefaultSingletonTraits<ServicesCustomizationDocument>;
+  FRIEND_TEST_ALL_PREFIXES(CustomizationWallpaperDownloaderBrowserTest,
+                           OEMWallpaperIsPresent);
+  FRIEND_TEST_ALL_PREFIXES(CustomizationWallpaperDownloaderBrowserTest,
+                           OEMWallpaperRetryFetch);
 
   typedef std::vector<base::WeakPtr<ServicesCustomizationExternalLoader> >
       ExternalLoaders;