Add ScopedMacRTL class for Cocoa browser RTL testing

chrome/browser/ui/cocoa/browser_window_layout.mm

 // Copyright 2014 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/browser_window_layout.h"
 
 #include <math.h>
 #include <string.h>
 
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
-#include "chrome/browser/ui/cocoa/l10n_util.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_controller.h"
+#import "ui/base/cocoa/rtl_feature.h"
 
 namespace chrome {
 
 // The height of the tab strip.
 const CGFloat kTabStripHeight = 37;
 
 bool ShouldUseFullSizeContentView() {
   // Chrome has added a subview above the window's content view, which the
   // Appkit warns about at runtime. This was done to make sure that window
   // buttons are always displayed above the content. Presumably, doing so may
@@ skipping 233 matching lines @@
   // overlapping these buttons.
   CGFloat maxX = width;
   if (!NSIsEmptyRect(parameters_.fullscreenButtonFrame)) {
     maxX = NSMinX(parameters_.fullscreenButtonFrame);
   }
   if (parameters_.shouldShowAvatar) {
     maxX = std::min(maxX, NSMinX(layout.avatarFrame));
   }
   layout.trailingIndent = width - maxX;
 
-  if (cocoa_l10n_util::ShouldDoExperimentalRTLLayout()) {
-    if (cocoa_l10n_util::ShouldFlipWindowControlsInRTL())
+  if (ui::ShouldDoExperimentalRTLLayout()) {
+    if (ui::ShouldFlipWindowControlsInRTL())
       layout.avatarFrame.origin.x =
           width - parameters_.avatarSize.width - layout.avatarFrame.origin.x;
     else
       std::swap(layout.leadingIndent, layout.trailingIndent);
   }
 
   output_.tabStripLayout = layout;
 }
 
 - (void)computeContentViewLayout {
@@ skipping 136 matching lines @@
 
 @end
 
 @implementation BrowserWindowLayout (ExposedForTesting)
 
 - (void)setOSYosemiteOrLater:(BOOL)osYosemiteOrLater {
   parameters_.isOSYosemiteOrLater = osYosemiteOrLater;
 }
 
 @end