[Mac] Mirror profile switcher UI 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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_L10N_UTIL_H_
 #define CHROME_BROWSER_UI_COCOA_L10N_UTIL_H_
 
 #import <Cocoa/Cocoa.h>
 #include <stddef.h>
 
@@ skipping 38 matching lines @@
 // buttons are reversed in RTL, so manually reversing them in previous
 // OSes would make Chrome stick out.
 bool ShouldFlipWindowControlsInRTL();
 
 // 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 NSMinXEdge for LTR and NSMaxXEdge for RTL.
+NSRectEdge LeadingEdge();
+// Returns NSMaxXEdge for LTR and NSMinXEdge for RTL.
+NSRectEdge TrailingEdge();
 
 // Returns an autoreleased image containing |image| flipped
 // across the x axis.
 NSImage* FlippedImage(NSImage* image);
 
 }  // namespace cocoa_l10n_util
 
 #endif  // CHROME_BROWSER_UI_COCOA_L10N_UTIL_H_