Switch AutomationTabHelper to use WebContentsUserData.

chrome/browser/automation/automation_tab_helper_browsertest.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 <string>
 
 #include "base/file_path.h"
 #include "base/path_service.h"
 #include "base/string16.h"
 #include "base/stringprintf.h"
@@ skipping 86 matching lines @@
           host, L"", ASCIIToWide(script)));
     } else {
       script += "window.domAutomationController.setAutomationId(0);"
                 "window.domAutomationController.send(0);";
       host->ExecuteJavascriptInWebFrame(string16(), ASCIIToUTF16(script));
     }
   }
 
   // Returns the |AutomationTabHelper| for the first browser's first tab.
   AutomationTabHelper* tab_helper() {
-    return chrome::GetTabContentsAt(browser(), 0)->automation_tab_helper();
+    return AutomationTabHelper::FromWebContents(
+        chrome::GetWebContentsAt(browser(), 0));
   }
 
  protected:
   FilePath test_data_dir_;
 };
 
 IN_PROC_BROWSER_TEST_F(AutomationTabHelperBrowserTest, FormSubmission) {
   ui_test_utils::NavigateToURL(browser(), net::FilePathToFileURL(
       test_data_dir_.AppendASCII("client_redirects.html")));
 
@@ skipping 89 matching lines @@
 IN_PROC_BROWSER_TEST_F(AutomationTabHelperBrowserTest,
                        CrashedTabStopsLoading) {
   MockTabEventObserver mock_tab_observer(tab_helper());
 
   testing::InSequence expect_in_sequence;
   EXPECT_CALL(mock_tab_observer, OnFirstPendingLoad(_));
   EXPECT_CALL(mock_tab_observer, OnNoMorePendingLoads(_));
 
   ui_test_utils::NavigateToURL(browser(), GURL(chrome::kChromeUICrashURL));
 }