Enable the new dialog style by default; etc.

ui/base/ui_base_switches_util.cc

 // Copyright (c) 2013 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 "ui/base/ui_base_switches_util.h"
 
 #include "base/command_line.h"
 #include "ui/base/ui_base_switches.h"
 
 namespace switches {
 
 bool IsTouchDragDropEnabled() {
   return CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableTouchDragDrop);
 }
 
 bool IsTouchEditingEnabled() {
   return CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableTouchEditing);
 }
 
 bool IsNewDialogStyleEnabled() {
   CommandLine* command_line = CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switches::kDisableNewDialogStyle))
     return false;
   if (command_line->HasSwitch(switches::kEnableNewDialogStyle))
     return true;
-  return false;
+  return true;
 }
 
 }  // namespace switches