NSView cleanup for CoreAnimation

chrome/browser/ui/cocoa/browser_window_controller.mm

 // Copyright 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.
 
 #import "chrome/browser/ui/cocoa/browser_window_controller.h"
 
 #include <cmath>
 #include <numeric>
 
 #include "base/command_line.h"
@@ skipping 957 matching lines @@
 
   // Change the height of the view and call |-layoutSubViews|. We set the height
   // here without regard to where the view is on the screen or whether it needs
   // to "grow up" or "grow down."  The below call to |-layoutSubviews| will
   // position each view correctly.
   NSRect frame = [view frame];
   if (NSHeight(frame) == height)
     return;
 
   // Disable screen updates to prevent flickering.
-  if (view == [bookmarkBarController_ view] ||
-      view == [downloadShelfController_ view]) {
-    [[self window] disableScreenUpdatesUntilFlush];
-  }
+  gfx::ScopedNSDisableScreenUpdates disabler;
 
   // Grow or shrink the window by the amount of the height change.  We adjust
   // the window height only in two cases:
   // 1) We are adjusting the height of the bookmark bar and it is currently
   // animating either open or closed.
   // 2) We are adjusting the height of the download shelf.
   //
   // We do not adjust the window height for bookmark bar changes on the NTP.
   BOOL shouldAdjustBookmarkHeight =
       [bookmarkBarController_ isAnimatingBetweenState:BookmarkBar::HIDDEN
@@ skipping 1195 matching lines @@
 
 - (BOOL)supportsBookmarkBar {
   return [self supportsWindowFeature:Browser::FEATURE_BOOKMARKBAR];
 }
 
 - (BOOL)isTabbedWindow {
   return browser_->is_type_tabbed();
 }
 
 @end  // @implementation BrowserWindowController(WindowType)