Rename and move ExperimentalMacRTL flag

chrome/browser/ui/cocoa/l10n_util.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_L10N_UTIL_H_
 #define CHROME_BROWSER_UI_COCOA_L10N_UTIL_H_
 
 #import <Cocoa/Cocoa.h>
 #include <stddef.h>
 
@@ skipping 19 matching lines @@
 
 // Like |base::ReplaceStringPlaceholders(const base::string16&,
 // const base::string16&, size_t*)|, but for a NSString formatString.
 NSString* ReplaceNSStringPlaceholders(NSString* formatString,
                                       const base::string16& a,
                                       size_t* offset);
 
 // Generates a tooltip string for a given URL and title.
 NSString* TooltipForURLAndTitle(NSString* url, NSString* title);
 
-extern const base::Feature kExperimentalMacRTL;
 // Returns whether both:
-// 1) Experimental Mac RTL support is enabled via the ExperimentalMacRTL
-//    feature;
+// 1) Mac RTL support is enabled via the MacRTL feature;
 // 2) The browser UI is in RTL mode.
-// If ExperimentalMacRTL becomes the default, this function can be replaced with
+// If MacRTL becomes the default, this function can be replaced with
 // uses of base::i18n::IsRTL().
 bool ShouldDoExperimentalRTLLayout();
 
 // Returns true if ShouldDoExperimentalRTLLayout() is true and the OS is
 // 10.12 or above. macOS 10.12 is the first OS where the native stoplight
 // buttons are reversed in RTL, so manually reversing them in previous
 // OSes would make Chrome stick out.
 bool ShouldFlipWindowControlsInRTL();
 
 // 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
 
 #endif  // CHROME_BROWSER_UI_COCOA_L10N_UTIL_H_