Move webui resources from chrome\browser\resources\shared to ui\webui\resources.

chrome/browser/resources/shared/css/throbber.css

Index: chrome/browser/resources/shared/css/throbber.css
===================================================================
--- chrome/browser/resources/shared/css/throbber.css	(revision 177292)
+++ chrome/browser/resources/shared/css/throbber.css	(working copy)
@@ -1,10 +0,0 @@
-/* Copyright (c) 2012 The Chromium Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file. */
-
-.throbber {
-  background: url('chrome://resources/images/throbber.svg');
-  display: inline-block;
-  height: 16px;
-  width: 16px;
-}