[cros] New OOBE design: wait for wallpaper on boot, then initializ WebUI.

BUG=133279
TEST=Manual. With --enable-new-oobe flag booted into OOBE, sign in screen (when OOBE is not completed).

Review URL: https://chromiumcodereview.appspot.com/10637002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@144153 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/ash/shell.cc b/ash/shell.cc
index db62d99..d84b700d 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -128,6 +128,9 @@
     return false;
   }
 
+  virtual void OnWallpaperAnimationFinished() OVERRIDE {
+  }
+
  private:
   DISALLOW_COPY_AND_ASSIGN(DummyUserWallpaperDelegate);
 };