New custom wallpaper picker UI

chrome/browser/chromeos/extensions/wallpaper_private_api.h

Index: chrome/browser/chromeos/extensions/wallpaper_private_api.h
diff --git a/chrome/browser/chromeos/extensions/wallpaper_private_api.h b/chrome/browser/chromeos/extensions/wallpaper_private_api.h
index 2c7486b1914ecc8e960ace7d4db14ffb86e3a0df..df7afe7a3c4b8898ff71b3f88456fe67dc4bebe2 100644
--- a/chrome/browser/chromeos/extensions/wallpaper_private_api.h
+++ b/chrome/browser/chromeos/extensions/wallpaper_private_api.h
@@ -157,11 +157,17 @@ class WallpaperPrivateSetCustomWallpaperFunction
                          scoped_ptr<gfx::ImageSkia> image);
 
   // Thumbnail is ready. Calls api function javascript callback.
-  void ThumbnailGenerated(const std::string& file_name);
+  void ThumbnailGenerated(base::RefCountedBytes* data);
 
   // Layout of the downloaded wallpaper.
   ash::WallpaperLayout layout_;
 
+  // True if need to generate thumbnail and pass to callback.
+  bool generate_thumbnail_;
+
+  // Unique file name of the custom wallpaper.
+  std::string file_name_;
+
   // Email address of logged in user.
   std::string email_;