Removed deprecated function IsRTLUILayout().

ios/chrome/browser/ui/rtl_geometry.mm

 // Copyright 2015 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.
 
 #include "ios/chrome/browser/ui/rtl_geometry.h"
 
 #include <limits>
 #import <UIKit/UIKit.h>
 
 #include "base/ios/ios_util.h"
@@ skipping 197 matching lines @@
 }
 
 #pragma mark - autolayout utilities
 
 NSLayoutFormatOptions LayoutOptionForRTLSupport() {
   if (UseRTLLayout()) {
     return NSLayoutFormatDirectionLeadingToTrailing;
   }
   return NSLayoutFormatDirectionLeftToRight;
 }
-
-#pragma mark - deprecated functions
-
-bool IsRTLUILayout() {
-  if (base::ios::IsRunningOnIOS9OrLater()) {
-#if __IPHONE_9_0
-    // Calling this method is better than using the locale on iOS9 since it will
-    // work with the right to left pseudolanguage.
-    return [UIView userInterfaceLayoutDirectionForSemanticContentAttribute:
-                       UISemanticContentAttributeUnspecified] ==
-           UIUserInterfaceLayoutDirectionRightToLeft;
-#endif
-  }
-  // Using NSLocale instead of base::i18n::IsRTL() in order to take into account
-  // right to left pseudolanguage correctly (which base::i18n::IsRTL() doesn't).
-  return [NSLocale characterDirectionForLanguage:
-                       [[NSLocale currentLocale]
-                           objectForKey:NSLocaleLanguageCode]] ==
-         NSLocaleLanguageDirectionRightToLeft;
-}