Switch AutomationTabHelper to use WebContentsUserData.

chrome/browser/automation/testing_automation_provider.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/automation/testing_automation_provider.h"
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 4181 matching lines @@
       reply.SendError(error);
       return;
     }
 
     RenderViewHost* render_view = web_contents->GetRenderViewHost();
     if (!render_view) {
       reply.SendError("Tab has no associated RenderViewHost");
       return;
     }
 
-    TabContents* tab_contents = TabContents::FromWebContents(web_contents);
-    tab_contents->automation_tab_helper()->HeapProfilerDump(reason_string);
+    AutomationTabHelper* automation_tab_helper =
+        AutomationTabHelper::FromWebContents(web_contents);
+    automation_tab_helper->HeapProfilerDump(reason_string);
     reply.SendSuccess(NULL);
     return;
   }
 
   reply.SendError("Process type is not supported");
 }
 #endif  // !defined(NO_TCMALLOC) && (defined(OS_LINUX) || defined(OS_CHROMEOS))
 
 namespace {
 
@@ skipping 2130 matching lines @@
 void TestingAutomationProvider::OnRemoveProvider() {
   if (g_browser_process)
     g_browser_process->GetAutomationProviderList()->RemoveProvider(this);
 }
 
 void TestingAutomationProvider::EnsureTabSelected(Browser* browser,
                                                   WebContents* tab) {
   if (chrome::GetActiveWebContents(browser) != tab)
     chrome::ActivateTabAt(browser, chrome::GetIndexOfTab(browser, tab), true);
 }