Remove TabContents from TabStripModelObserver::TabReplacedAt.

chrome/browser/ui/tabs/tab_strip_model_unittest.cc

 // Copyright (c) 2012 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/ui/tabs/tab_strip_model.h"
 
 #include <map>
 #include <string>
 
 #include "base/file_path.h"
@@ skipping 299 matching lines @@
   }
   virtual void TabDeactivated(WebContents* contents) OVERRIDE {
     states_.push_back(State(contents, model()->active_index(), DEACTIVATE));
   }
   virtual void TabChangedAt(WebContents* contents,
                             int index,
                             TabChangeType change_type) OVERRIDE {
     states_.push_back(State(contents, index, CHANGE));
   }
   virtual void TabReplacedAt(TabStripModel* tab_strip_model,
-                             TabContents* old_contents,
-                             TabContents* new_contents,
+                             WebContents* old_contents,
+                             WebContents* new_contents,
                              int index) OVERRIDE {
-    State s(
-        new_contents ? new_contents->web_contents() : NULL, index, REPLACED);
-    s.src_contents = old_contents ? old_contents->web_contents() : NULL;
+    State s(new_contents, index, REPLACED);
+    s.src_contents = old_contents;
     states_.push_back(s);
   }
   virtual void TabPinnedStateChanged(WebContents* contents,
                                      int index) OVERRIDE {
     states_.push_back(State(contents, index, PINNED));
   }
   virtual void TabStripEmpty() OVERRIDE {
     empty_ = true;
   }
 
@@ skipping 2025 matching lines @@
   strip.ActivateTabAt(1, true);
   ASSERT_EQ(1, observer.GetStateCount());
   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();
 }