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

chrome/browser/automation/automation_provider.cc

 // Copyright (c) 2009 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/automation/automation_provider.h"
 
 #include <set>
 
 #include "app/l10n_util.h"
 #include "app/message_box_flags.h"
@@ skipping 1360 matching lines @@
 void AutomationProvider::CloseBrowserAsync(int browser_handle) {
   if (browser_tracker_->ContainsHandle(browser_handle)) {
     Browser* browser = browser_tracker_->GetResource(browser_handle);
     browser->window()->Close();
   } else {
     NOTREACHED();
   }
 }
 
 void AutomationProvider::NavigateInExternalTab(
-    int handle, const GURL& url,
+    int handle, const GURL& url, const GURL& referrer,
     AutomationMsg_NavigationResponseValues* status) {
   *status = AUTOMATION_MSG_NAVIGATION_ERROR;
 
   if (tab_tracker_->ContainsHandle(handle)) {
     NavigationController* tab = tab_tracker_->GetResource(handle);
-    tab->LoadURL(url, GURL(), PageTransition::TYPED);
+    tab->LoadURL(url, referrer, PageTransition::TYPED);
     *status = AUTOMATION_MSG_NAVIGATION_SUCCESS;
   }
 }
 
 void AutomationProvider::NavigateExternalTabAtIndex(
     int handle, int navigation_index,
     AutomationMsg_NavigationResponseValues* status) {
   *status = AUTOMATION_MSG_NAVIGATION_ERROR;
 
   if (tab_tracker_->ContainsHandle(handle)) {
@@ skipping 700 matching lines @@
   for (;iter != BrowserList::end(); ++iter) {
     gfx::NativeWindow this_window = (*iter)->window()->GetNativeHandle();
     if (window == this_window) {
       // Add() returns the existing handle for the resource if any.
       *browser_handle = browser_tracker_->Add(*iter);
       *success = true;
       return;
     }
   }
 }