Speculative revert to see if this change introduced a performance regression on Mac intl perf bots.

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 523 matching lines @@
     Browser* browser = browser_tracker_->GetResource(handle);
     *active_tab_index = browser->active_index();
   }
 }
 
 void TestingAutomationProvider::CloseTab(int tab_handle,
                                          bool wait_until_closed,
                                          IPC::Message* reply_message) {
   if (tab_tracker_->ContainsHandle(tab_handle)) {
     NavigationController* controller = tab_tracker_->GetResource(tab_handle);
-    Browser* browser = browser::FindBrowserWithWebContents(
-        controller->GetWebContents());
+    int index;
+    Browser* browser = browser::FindBrowserForController(controller, &index);
     DCHECK(browser);
     new TabClosedNotificationObserver(this, wait_until_closed, reply_message,
                                       false);
     chrome::CloseWebContents(browser, controller->GetWebContents());
     return;
   }
 
   AutomationMsg_CloseTab::WriteReplyParams(reply_message, false);
   Send(reply_message);
 }
@@ skipping 497 matching lines @@
     }
     *title_string_size = static_cast<int>(title->size());
   }
 }
 
 void TestingAutomationProvider::GetTabIndex(int handle, int* tabstrip_index) {
   *tabstrip_index = -1;  // -1 is the error code
 
   if (tab_tracker_->ContainsHandle(handle)) {
     NavigationController* tab = tab_tracker_->GetResource(handle);
-    Browser* browser = browser::FindBrowserWithWebContents(
-        tab->GetWebContents());
+    Browser* browser = browser::FindBrowserForController(tab, NULL);
     *tabstrip_index = chrome::GetIndexOfTab(browser, tab->GetWebContents());
   }
 }
 
 void TestingAutomationProvider::GetTabURL(int handle,
                                           bool* success,
                                           GURL* url) {
   *success = false;
   if (tab_tracker_->ContainsHandle(handle)) {
     NavigationController* tab = tab_tracker_->GetResource(handle);
@@ skipping 6091 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);
 }