Plumb the referrer throughout the OpenURL APIs....

chrome/browser/render_view_host_delegate.h

 // Copyright (c) 2006-2008 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_BROWSER_RENDER_VIEW_HOST_DELEGATE_H__
 #define CHROME_BROWSER_RENDER_VIEW_HOST_DELEGATE_H__
 
 #include <string>
 #include <vector>
 
@@ skipping 211 matching lines @@
   // An image that was requested to be downloaded by DownloadImage has
   // completed.
   virtual void DidDownloadImage(RenderViewHost* render_view_host,
                                 int id,
                                 const GURL& image_url,
                                 bool errored,
                                 const SkBitmap& image) { }
 
   // The page wants to open a URL with the specified disposition.
   virtual void RequestOpenURL(const GURL& url,
+                              const GURL& referrer,
                               WindowOpenDisposition disposition) { }
 
   // A DOM automation operation completed. The result of the operation is
   // expressed in a json string.
   virtual void DomOperationResponse(const std::string& json_string,
                                     int automation_id) { }
 
   // A message was sent from HTML-based UI.
   // By default we ignore such messages.
   virtual void ProcessDOMUIMessage(const std::string& message,
@@ skipping 115 matching lines @@
       const webkit_glue::WebApplicationInfo& app_info) { }
 
   // Notification the user has pressed enter or space while focus was on the
   // page. This is used to avoid uninitiated user downloads (aka carpet
   // bombing), see DownloadRequestManager for details.
   virtual void OnEnterOrSpace() { }
 };
 
 #endif  // CHROME_BROWSER_RENDER_VIEW_HOST_DELEGATE_H__