[Mac] Don't flip window controls in RTL for macOS < 10.12

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"
@@ skipping 247 matching lines @@
   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()) {
-    layout.avatarFrame.origin.x =
-        width - parameters_.avatarSize.width - layout.avatarFrame.origin.x;
+    if (cocoa_l10n_util::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 {
   chrome::LayoutParameters parameters = parameters_;
   CGFloat maxY = maxY_;
 
   // Sanity-check |maxY|.
@@ skipping 132 matching lines @@
 
 @end
 
 @implementation BrowserWindowLayout (ExposedForTesting)
 
 - (void)setOSYosemiteOrLater:(BOOL)osYosemiteOrLater {
   parameters_.isOSYosemiteOrLater = osYosemiteOrLater;
 }
 
 @end