[Mac] Mirror profile switcher UI in RTL

chrome/browser/ui/cocoa/l10n_util.h

Index: chrome/browser/ui/cocoa/l10n_util.h
diff --git a/chrome/browser/ui/cocoa/l10n_util.h b/chrome/browser/ui/cocoa/l10n_util.h
index cf36a2229a3d8da367555b3c68d2c48ac5fa8110..3d0997b71c81fab26009c08fbbee3cf358fa53a9 100644
--- a/chrome/browser/ui/cocoa/l10n_util.h
+++ b/chrome/browser/ui/cocoa/l10n_util.h
@@ -56,6 +56,10 @@ 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.