Use content::Referrer to pass around referrers in the plugin code

content/child/npapi/webplugin_delegate_impl.cc

 // 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.
 
 #include "content/child/npapi/webplugin_delegate_impl.h"
 
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 293 matching lines @@
   return resource_client;
 }
 
 void WebPluginDelegateImpl::FetchURL(unsigned long resource_id,
                                      int notify_id,
                                      const GURL& url,
                                      const GURL& first_party_for_cookies,
                                      const std::string& method,
                                      const char* buf,
                                      unsigned int len,
-                                     const GURL& referrer,
+                                     const Referrer& referrer,
                                      bool notify_redirects,
                                      bool is_plugin_src_load,
                                      int origin_pid,
                                      int render_frame_id,
                                      int render_view_id) {
   // TODO(jam): once we switch over to resource loading always happening in this
   // code path, remove WebPluginResourceClient abstraction.
   PluginStreamUrl* plugin_stream = instance()->CreateStream(
       resource_id, url, std::string(), notify_id);
 
   bool copy_stream_data = !!(quirks_ & PLUGIN_QUIRK_COPY_STREAM_DATA);
   plugin_stream->SetPluginURLFetcher(new PluginURLFetcher(
       plugin_stream, url, first_party_for_cookies, method, buf, len,
       referrer, std::string(), notify_redirects, is_plugin_src_load, origin_pid,
       render_frame_id, render_view_id, resource_id, copy_stream_data));
 }
 
 }  // namespace content