Change NavigationController::LoadURL to take a Referrer class instead of a GURL as referrer

chrome/browser/extensions/extension_host.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_host.h"
 
 #include <list>
 
 #include "base/bind.h"
 #include "base/memory/singleton.h"
@@ skipping 227 matching lines @@
 void ExtensionHost::LoadInitialURL() {
   if (!is_background_page() &&
       !profile_->GetExtensionService()->IsBackgroundPageReady(extension_)) {
     // Make sure the background page loads before any others.
     registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_BACKGROUND_PAGE_READY,
                    content::Source<Extension>(extension_));
     return;
   }
 
   host_contents_->controller().LoadURL(
-      initial_url_, GURL(), content::PAGE_TRANSITION_LINK, std::string());
+      initial_url_, content::Referrer(), content::PAGE_TRANSITION_LINK,
+      std::string());
 }
 
 void ExtensionHost::Observe(int type,
                             const content::NotificationSource& source,
                             const content::NotificationDetails& details) {
   switch (type) {
     case chrome::NOTIFICATION_EXTENSION_BACKGROUND_PAGE_READY:
       DCHECK(profile_->GetExtensionService()->
           IsBackgroundPageReady(extension_));
       LoadInitialURL();
@@ skipping 257 matching lines @@
   browser->AddTabContents(contents, disposition, initial_pos, user_gesture);
 }
 
 
 void ExtensionHost::RenderViewReady() {
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_EXTENSION_HOST_CREATED,
       content::Source<Profile>(profile_),
       content::Details<ExtensionHost>(this));
 }