Move scoped_nsdisable_screen_update from base to app/mac

Move scoped_aedesc from base to base/mac
Use namespace and proper Google-style class naming.

TEST=it compiles
BUG=none
Review URL: http://codereview.chromium.org/3828009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@62904 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 37 insertions, 0 deletions

diff --git a/app/mac/scoped_nsdisable_screen_updates.h b/app/mac/scoped_nsdisable_screen_updates.h
new file mode 100644
index 0000000..14a948c
--- /dev/null
+++ b/app/mac/scoped_nsdisable_screen_updates.h
@@ -0,0 +1,37 @@
+// 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 APP_MAC_SCOPED_NSDISABLE_SCREEN_UPDATES_H_
+#define APP_MAC_SCOPED_NSDISABLE_SCREEN_UPDATES_H_
+#pragma once
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/basictypes.h"
+
+namespace app {
+namespace mac {
+
+// A stack-based class to disable Cocoa screen updates. When instantiated, it
+// disables screen updates and enables them when destroyed. Update disabling
+// can be nested, and there is a time-maximum (about 1 second) after which
+// Cocoa will automatically re-enable updating. This class doesn't attempt to
+// overrule that.
+class ScopedNSDisableScreenUpdates {
+ public:
+  ScopedNSDisableScreenUpdates() {
+    NSDisableScreenUpdates();
+  }
+  ~ScopedNSDisableScreenUpdates() {
+    NSEnableScreenUpdates();
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ScopedNSDisableScreenUpdates);
+};
+
+}  // namespace mac
+}  // namespace app
+
+#endif  // APP_MAC_SCOPED_NSDISABLE_SCREEN_UPDATES_H_