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

chrome/browser/tabs/tab_strip_model_unittest.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/tabs/tab_strip_model.h"
 
 #include <map>
 #include <string>
 
 #include "base/file_path.h"
@@ skipping 87 matching lines @@
                                               bool maximize) {
     return NULL;
   }
   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 {
     if (url == GURL(chrome::kChromeUINewTabURL))
       return dummy_contents_;
     return NULL;
   }
   virtual bool CanDuplicateContentsAt(int index) { return false; }
   virtual void DuplicateContentsAt(int index) {}
@@ skipping 2256 matching lines @@
   ASSERT_EQ(1, observer.GetStateCount());
   MockTabStripModelObserver::State s(
       contents2, 1, MockTabStripModelObserver::SELECT);
   s.src_contents = contents2;
   s.src_index = 1;
   s.user_gesture = false;
   EXPECT_TRUE(observer.StateEquals(0, s));
   strip.RemoveObserver(&observer);
   strip.CloseAllTabs();
 }