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

chrome/browser/ui/cocoa/browser_window_layout.mm

Index: chrome/browser/ui/cocoa/browser_window_layout.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_layout.mm b/chrome/browser/ui/cocoa/browser_window_layout.mm
index 61ea945871ce2dcedcc63f1a8bc385dc96b50e4f..95819323bd8cf1055aa254077f5146262b118a74 100644
--- a/chrome/browser/ui/cocoa/browser_window_layout.mm
+++ b/chrome/browser/ui/cocoa/browser_window_layout.mm
@@ -265,8 +265,11 @@ const CGFloat kLocationBarRightOffset = 35;
   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;