[Mac] Mirror profile switcher UI in RTL

chrome/browser/ui/cocoa/l10n_util.mm

 // 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 "chrome/browser/ui/cocoa/l10n_util.h"
 
 #include "base/i18n/rtl.h"
 #include "base/mac/mac_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 99 matching lines @@
 }
 #else
 NSCellImagePosition LeadingCellImagePosition() {
   return NSImageLeading;
 }
 NSCellImagePosition TrailingCellImagePosition() {
   return NSImageTrailing;
 }
 #endif  // MAC_OS_X_VERSION_10_12
 
+NSRectEdge LeadingEdge() {
+  return ShouldDoExperimentalRTLLayout() ? NSMaxXEdge : NSMinXEdge;
+}
+
+NSRectEdge TrailingEdge() {
+  return ShouldDoExperimentalRTLLayout() ? NSMinXEdge : NSMaxXEdge;
+}
+
 // Adapted from Apple's RTL docs (goo.gl/cBaFnT)
 NSImage* FlippedImage(NSImage* image) {
   const NSSize size = [image size];
   NSImage* flipped_image = [[[NSImage alloc] initWithSize:size] autorelease];
 
   [flipped_image lockFocus];
   [[NSGraphicsContext currentContext]
       setImageInterpolation:NSImageInterpolationHigh];
 
   NSAffineTransform* transform = [NSAffineTransform transform];
   [transform translateXBy:size.width yBy:0];
   [transform scaleXBy:-1 yBy:1];
   [transform concat];
 
   [image drawAtPoint:NSZeroPoint
             fromRect:NSMakeRect(0, 0, size.width, size.height)
            operation:NSCompositeSourceOver
             fraction:1.0];
 
   [flipped_image unlockFocus];
 
   return flipped_image;
 }
 
 }  // namespace cocoa_l10n_util