Add ScopedMacRTL class for Cocoa browser RTL testing

chrome/browser/ui/cocoa/new_tab_button.mm

 // Copyright (c) 2011 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/new_tab_button.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/sdk_forward_declarations.h"
 #import "chrome/browser/ui/cocoa/image_button_cell.h"
-#include "chrome/browser/ui/cocoa/l10n_util.h"
 #include "chrome/browser/ui/cocoa/tabs/tab_view.h"
 #include "chrome/grit/theme_resources.h"
 #include "ui/base/cocoa/nsgraphics_context_additions.h"
+#import "ui/base/cocoa/rtl_feature.h"
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/theme_provider.h"
 
 @class NewTabButtonCell;
 
 namespace {
 
 enum class OverlayOption {
   NONE,
@@ skipping 343 matching lines @@
 
   [bezierPath curveToPoint:NSMakePoint(62.2756294,30)
              controlPoint1:NSMakePoint(64.0268555,28.5502144)
              controlPoint2:NSMakePoint(63.227482,29.9977011)];
 
   [bezierPath closePath];
 
   // The SVG path is flipped for some reason, so flip it back. However, in RTL,
   // we'd need to flip it again below, so when in RTL mode just leave the flip
   // out altogether.
-  if (!cocoa_l10n_util::ShouldDoExperimentalRTLLayout()) {
+  if (!ui::ShouldDoExperimentalRTLLayout()) {
     const CGFloat kSVGHeight = 32;
     NSAffineTransformStruct flipStruct = {1, 0, 0, -1, 0, kSVGHeight};
     NSAffineTransform* flipTransform = [NSAffineTransform transform];
     [flipTransform setTransformStruct:flipStruct];
     [bezierPath transformUsingAffineTransform:flipTransform];
   }
 
   // The SVG data is for the 2x version so scale it down.
   NSAffineTransform* scaleTransform = [NSAffineTransform transform];
   const CGFloat k50PercentScale = 0.5;
@@ skipping 105 matching lines @@
   [fillColor set];
   CGContextRef context = static_cast<CGContextRef>(
       [[NSGraphicsContext currentContext] graphicsPort]);
   CGFloat lineWidth = LineWidthFromContext(context);
   [[NewTabButton newTabButtonBezierPathWithLineWidth:lineWidth] fill];
   [image unlockFocus];
   return image;
 }
 
 @end