Move scoped_nsdisable_screen_update from base to app/mac...

base/scoped_aedesc.h

-// Copyright (c) 2010 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.
-
-#ifndef BASE_SCOPED_AEDESC_H_
-#define BASE_SCOPED_AEDESC_H_
-#pragma once
-
-#import <CoreServices/CoreServices.h>
-
-#include "base/basictypes.h"
-
-// The scoped_aedesc is used to scope AppleEvent descriptors.  On creation,
-// it will store a NULL descriptor.  On destruction, it will dispose of the
-// descriptor.
-//
-// This class is parameterized for additional type safety checks.  You can use
-// the generic AEDesc type by not providing a template parameter:
-//  scoped_aedesc<> desc;
-template <typename AEDescType = AEDesc>
-class scoped_aedesc {
- public:
-  scoped_aedesc() {
-    AECreateDesc(typeNull, NULL, 0, &desc_);
-  }
-
-  ~scoped_aedesc() {
-    AEDisposeDesc(&desc_);
-  }
-
-  // Used for in parameters.
-  operator const AEDescType*() {
-    return &desc_;
-  }
-
-  // Used for out parameters.
-  AEDescType* OutPointer() {
-    return &desc_;
-  }
-
- private:
-  AEDescType desc_;
-
-  DISALLOW_COPY_AND_ASSIGN(scoped_aedesc);
-};
-
-#endif  // BASE_SCOPED_AEDESC_H_