Update CreateTabContents to use a content::Referrer instead of a plain URL

chrome/browser/tabs/tab_strip_model_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 CHROME_BROWSER_TABS_TAB_STRIP_MODEL_DELEGATE_H_
 #define CHROME_BROWSER_TABS_TAB_STRIP_MODEL_DELEGATE_H_
 #pragma once
 
 #include "content/public/common/page_transition_types.h"
 
 class Browser;
 class DockInfo;
 class GURL;
 class Profile;
 class SiteInstance;
 class TabContents;
 class TabContentsWrapper;
+namespace content {
+struct Referrer;
+}
 namespace gfx {
 class Rect;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 //
 // TabStripModelDelegate
 //
 //  A delegate interface that the TabStripModel uses to perform work that it
 //  can't do itself, such as obtain a container HWND for creating new
@@ skipping 28 matching lines @@
   // Determines what drag actions are possible for the specified strip.
   virtual int GetDragActions() const = 0;
 
   // Creates an appropriate TabContents for the given URL. This is handled by
   // the delegate since the TabContents may require special circumstances to
   // exist for it to be constructed (e.g. a parent HWND).
   // If |defer_load| is true, the navigation controller doesn't load the url.
   // If |instance| is not null, its process is used to render the tab.
   virtual TabContentsWrapper* CreateTabContentsForURL(
       const GURL& url,
-      const GURL& referrer,
+      const content::Referrer& referrer,
       Profile* profile,
       content::PageTransition transition,
       bool defer_load,
       SiteInstance* instance) const = 0;
 
   // Returns whether some contents can be duplicated.
   virtual bool CanDuplicateContentsAt(int index) = 0;
 
   // Duplicates the contents at the provided index and places it into its own
   // window.
@@ skipping 36 matching lines @@
   virtual bool CanCloseTab() const = 0;
 
   // Returns true if the tab strip can use large icons.
   virtual bool LargeIconsPermitted() const = 0;
 
  protected:
   virtual ~TabStripModelDelegate() {}
 };
 
 #endif  // CHROME_BROWSER_TABS_TAB_STRIP_MODEL_DELEGATE_H_