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

chrome/browser/ui/cocoa/tabs/tab_strip_controller_unittest.mm

 // 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include <vector>
 
 #import "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/cocoa/cocoa_profile_test.h"
@@ skipping 42 matching lines @@
   }
   virtual void ContinueDraggingDetachedTab(TabContentsWrapper* contents,
                                            const gfx::Rect& window_bounds,
                                            const gfx::Rect& tab_bounds) {
   }
   virtual int GetDragActions() const {
     return 0;
   }
   virtual TabContentsWrapper* CreateTabContentsForURL(
       const GURL& url,
-      const GURL& referrer,
+      const content::Referrer& referrer,
       Profile* profile,
       content::PageTransition transition,
       bool defer_load,
       SiteInstance* instance) const {
     return NULL;
   }
   virtual bool CanDuplicateContentsAt(int index) { return true; }
   virtual void DuplicateContentsAt(int index) { }
   virtual void CloseFrameAfterDragSession() { }
   virtual void CreateHistoricalTab(TabContentsWrapper* contents) { }
@@ skipping 91 matching lines @@
   // TODO(pinkerton): Implement http://crbug.com/10899
 }
 
 // Test that changing the number of tabs broadcasts a
 // kTabStripNumberOfTabsChanged notifiction.
 TEST_F(TabStripControllerTest, Notifications) {
   // TODO(pinkerton): Implement http://crbug.com/10899
 }
 
 }  // namespace