Move scoped_nsdisable_screen_update from base to app/mac...

base/scoped_nsautorelease_pool.h

-// Copyright (c) 2008 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_NSAUTORELEASE_POOL_H_
-#define BASE_SCOPED_NSAUTORELEASE_POOL_H_
-#pragma once
-
-#include "base/basictypes.h"
-
-#if defined(OS_MACOSX)
-#if defined(__OBJC__)
-@class NSAutoreleasePool;
-#else  // __OBJC__
-class NSAutoreleasePool;
-#endif  // __OBJC__
-#endif  // OS_MACOSX
-
-namespace base {
-
-// On the Mac, ScopedNSAutoreleasePool allocates an NSAutoreleasePool when
-// instantiated and sends it a -drain message when destroyed.  This allows an
-// autorelease pool to be maintained in ordinary C++ code without bringing in
-// any direct Objective-C dependency.
-//
-// On other platforms, ScopedNSAutoreleasePool is an empty object with no
-// effects.  This allows it to be used directly in cross-platform code without
-// ugly #ifdefs.
-class ScopedNSAutoreleasePool {
- public:
-#if !defined(OS_MACOSX)
-  ScopedNSAutoreleasePool() {}
-  void Recycle() { }
-#else  // OS_MACOSX
-  ScopedNSAutoreleasePool();
-  ~ScopedNSAutoreleasePool();
-
-  // Clear out the pool in case its position on the stack causes it to be
-  // alive for long periods of time (such as the entire length of the app).
-  // Only use then when you're certain the items currently in the pool are
-  // no longer needed.
-  void Recycle();
- private:
-  NSAutoreleasePool* autorelease_pool_;
-#endif  // OS_MACOSX
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ScopedNSAutoreleasePool);
-};
-
-}  // namespace base
-
-#endif  // BASE_SCOPED_NSAUTORELEASE_POOL_H_