[WebUI] Fix rest of CSS style nits in misc. dirs so I can turn on CSS checker.

chrome/browser/resources/shared/css/spinner.css

Index: chrome/browser/resources/shared/css/spinner.css
diff --git a/chrome/browser/resources/shared/css/spinner.css b/chrome/browser/resources/shared/css/spinner.css
index f1df657df9aac414d198d8caaeaa187b83e9d7cd..d7f7ca8e1ca487bd0bfe562eabc1dec6d163a68a 100644
--- a/chrome/browser/resources/shared/css/spinner.css
+++ b/chrome/browser/resources/shared/css/spinner.css
@@ -1,3 +1,7 @@
+/* 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. */
+
 .inline-spinner,
 .spinner {
   background-image: url('chrome://resources/images/spinner.svg');