Cleanup: Fix content header include guards.

content/renderer/clipboard_utils.h

 // Copyright 2013 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.
 
 #ifndef CONTENT_RENDERER_CLIPBOARD_UTILS_H_
 #define CONTENT_RENDERER_CLIPBOARD_UTILS_H_
 
 #include <string>
 
 #include "content/common/content_export.h"
 
 namespace blink {
 class WebString;
 class WebURL;
 }
 
 namespace content {
 
 CONTENT_EXPORT std::string URLToMarkup(const blink::WebURL& url,
                                        const blink::WebString& title);
 
 CONTENT_EXPORT std::string URLToImageMarkup(const blink::WebURL& url,
                                             const blink::WebString& title);
 
 }  // namespace content
 
-#endif  //  CONTENT_RENDERER_CLIPBOARD_UTILS_H_
+#endif  // CONTENT_RENDERER_CLIPBOARD_UTILS_H_