move favicon download code from chrome/ into content/

content/public/common/favicon_url.h

 // Copyright (c) 2011 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 CHROME_COMMON_FAVICON_URL_
-#define CHROME_COMMON_FAVICON_URL_
+#ifndef CONTENT_PUBLIC_COMMON_FAVICON_URL_
+#define CONTENT_PUBLIC_COMMON_FAVICON_URL_
 
 #include "googleurl/src/gurl.h"
 
+namespace content {
+
 // The favicon url from the render.
 struct FaviconURL {
   // The icon type in a page. The definition must be same as history::IconType.
   enum IconType {
     INVALID_ICON = 0x0,
     FAVICON = 1 << 0,
     TOUCH_ICON = 1 << 1,
     TOUCH_PRECOMPOSED_ICON = 1 << 2
   };
 
   FaviconURL();
   FaviconURL(const GURL& url, IconType type);
   ~FaviconURL();
 
   // The url of the icon.
   GURL icon_url;
 
   // The type of the icon
   IconType icon_type;
 };
 
-#endif  // CHROME_COMMON_FAVICON_URL_
+} // namespace content
+
+#endif  // CONTENT_PUBLIC_COMMON_FAVICON_URL_