move favicon download code from chrome/ into content/

content/public/common/favicon_url.cc

 // 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.
 
-#include "chrome/common/favicon_url.h"
+#include "content/public/common/favicon_url.h"
+
+namespace content {
 
 FaviconURL::FaviconURL()
   : icon_type(INVALID_ICON) {
 }
 
 FaviconURL::FaviconURL(const GURL& url, IconType type)
     : icon_url(url),
       icon_type(type) {
 }
 
 FaviconURL::~FaviconURL() {
 }
+
+} // namespace content