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

content/child/npapi/webplugin_delegate.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 CONTENT_CHILD_NPAPI_WEBPLUGIN_DELEGATE_H_
 #define CONTENT_CHILD_NPAPI_WEBPLUGIN_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 10 matching lines @@
 namespace blink {
 class WebInputEvent;
 }
 
 namespace gfx {
 class Rect;
 }
 
 namespace content {
 
+struct Referrer;
 class WebPluginResourceClient;
 
 // This is the interface that a plugin implementation needs to provide.
 class WebPluginDelegate {
  public:
   virtual ~WebPluginDelegate() {}
 
   // Initializes the plugin implementation with the given (UTF8) arguments.
   // Note that the lifetime of WebPlugin must be longer than this delegate.
   // If this function returns false the plugin isn't started and shouldn't be
@@ skipping 90 matching lines @@
   // Tell the plugin that the given URL should be fetched. This is a result of
   // loading the plugin data or the plugin calling HandleURLRequest which didn't
   // end up being routed to another frame or being a javscript:// URL.
   virtual void 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) = 0;
 
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_NPAPI_WEBPLUGIN_DELEGATE_H_