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

chrome/browser/ui/browser_tab_restore_service_delegate.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/browser_tab_restore_service_delegate.h"
 
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_tabrestore.h"
@@ skipping 82 matching lines @@
         Browser::CreateParams::CreateForApp(
             Browser::TYPE_POPUP, app_name, gfx::Rect(), profile));
   }
   if (browser)
     return browser->tab_restore_service_delegate();
   else
     return NULL;
 }
 
 // static
-TabRestoreServiceDelegate*
-    TabRestoreServiceDelegate::FindDelegateForWebContents(
-        const WebContents* contents) {
-  Browser* browser = browser::FindBrowserWithWebContents(contents);
-  return browser ? browser->tab_restore_service_delegate() : NULL;
+TabRestoreServiceDelegate* TabRestoreServiceDelegate::FindDelegateForController(
+    const NavigationController* controller,
+    int* index) {
+  Browser* browser = browser::FindBrowserForController(controller, index);
+  if (browser)
+    return browser->tab_restore_service_delegate();
+  else
+    return NULL;
 }
 
 // static
 TabRestoreServiceDelegate* TabRestoreServiceDelegate::FindDelegateWithID(
     SessionID::id_type desired_id) {
   Browser* browser = browser::FindBrowserWithID(desired_id);
-  return browser ? browser->tab_restore_service_delegate() : NULL;
+  if (browser)
+    return browser->tab_restore_service_delegate();
+  else
+    return NULL;
 }