Reverse bookmark buttons and menus 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 fcf68d99634379baa24d16970b50a7c17b9f5b6d..9d83c19246b90090e43ddaa40fcbe6be403d1907 100644
--- a/chrome/browser/ui/cocoa/l10n_util.h
+++ b/chrome/browser/ui/cocoa/l10n_util.h
@@ -43,4 +43,17 @@ extern const base::Feature kExperimentalMacRTL;
 // uses of base::i18n::IsRTL().
 bool ShouldDoExperimentalRTLLayout();
 
+// 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