Switch Extensions::TabHelper to use WebContents, WebContentsUserData.

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 1814 matching lines @@
 
   DictionaryValue manifest;
   manifest.SetString("name", "hi!");
   manifest.SetString("version", "1");
   std::string error;
   scoped_refptr<Extension> extension_app(
       Extension::Create(path, Extension::INVALID, manifest, Extension::NO_FLAGS,
                         &error));
   extension_app->launch_web_url_ = "http://www.google.com";
   TabContents* contents1 = CreateTabContents();
-  contents1->extension_tab_helper()->SetExtensionApp(extension_app);
+  extensions::TabHelper::FromWebContents(contents1->web_contents())->
+      SetExtensionApp(extension_app);
   TabContents* contents2 = CreateTabContents();
-  contents2->extension_tab_helper()->SetExtensionApp(extension_app);
+  extensions::TabHelper::FromWebContents(contents2->web_contents())->
+      SetExtensionApp(extension_app);
   TabContents* contents3 = CreateTabContents();
 
   SetID(contents1->web_contents(), 1);
   SetID(contents2->web_contents(), 2);
   SetID(contents3->web_contents(), 3);
 
   // Note! The ordering of these tests is important, each subsequent test
   // builds on the state established in the previous. This is important if you
   // ever insert tests rather than append.
 
@@ skipping 591 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();
 }