When Chrome hands off a URL to be opened by the external host by the ViewHost...

chrome/browser/external_tab_container.cc

 // 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.
 
 #include "chrome/browser/external_tab_container.h"
 
 #include <string>
 
 #include "app/l10n_util.h"
 #include "app/win_util.h"
@@ skipping 246 matching lines @@
   switch (disposition) {
     case CURRENT_TAB:
     case SINGLETON_TAB:
     case NEW_FOREGROUND_TAB:
     case NEW_BACKGROUND_TAB:
     case NEW_POPUP:
     case NEW_WINDOW:
     case SAVE_TO_DISK:
       if (automation_) {
         automation_->Send(new AutomationMsg_OpenURL(0, tab_handle_,
-                                                    url, disposition));
+                                                    url, referrer,
+                                                    disposition));
       }
       break;
     default:
       NOTREACHED();
       break;
   }
 }
 
 void ExternalTabContainer::NavigationStateChanged(const TabContents* source,
                                                   unsigned changed_flags) {
@@ skipping 375 matching lines @@
 
 bool ExternalTabContainer::OnGoToEntryOffset(int offset) {
   if (load_requests_via_automation_) {
     automation_->Send(new AutomationMsg_RequestGoToHistoryEntryOffset(
         0, tab_handle_, offset));
     return false;
   }
 
   return true;
 }