Reverse bookmark buttons and menus in RTL

chrome/browser/ui/cocoa/l10n_util.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.
 
 #import <Cocoa/Cocoa.h>
 #include <stddef.h>
 
 #include "base/feature_list.h"
 #include "base/strings/string16.h"
 
@@ skipping 31 matching lines @@
 // If ExperimentalMacRTL becomes the default, this function can be replaced with
 // uses of base::i18n::IsRTL().
 bool ShouldDoExperimentalRTLLayout();
 
 // Returns true if ShouldDoExperimentalRTLLayout() is true and the OS is
 // 10.12 or above. macOS 10.12 is the first OS where the native stoplight
 // buttons are reversed in RTL, so manually reversing them in previous
 // OSes would make Chrome stick out.
 bool ShouldFlipWindowControlsInRTL();
 
+// TODO(lgrey): Remove these when all builds are on 10.12 SDK.
+
+// Returns NSImageLeading when available (10.12+), otherwise
+// NSImageLeft for LTR and NSImageRight in RTL.
+NSCellImagePosition LeadingCellImagePosition();
+// Returns NSImageTrailing when available (10.12+), otherwise
+// NSImageRight for LTR and NSImageLeft in RTL.
+NSCellImagePosition TrailingCellImagePosition();
+
+// Returns an autoreleased image containing |image| flipped
+// across the x axis.
+NSImage* FlippedImage(NSImage* image);
+
 }  // namespace cocoa_l10n_util