Properly pin the incognito avatar.

chrome/browser/ui/cocoa/browser_window_controller.mm

Index: chrome/browser/ui/cocoa/browser_window_controller.mm
diff --git a/chrome/browser/ui/cocoa/browser_window_controller.mm b/chrome/browser/ui/cocoa/browser_window_controller.mm
index 57efa23c3a539b33a5b809834e36bddee98065c2..6ff272015fb20ec01e5108434a4482bf73234668 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller.mm
+++ b/chrome/browser/ui/cocoa/browser_window_controller.mm
@@ -1662,6 +1662,10 @@ bool IsTabDetachingInFullscreenEnabled() {
       [[AvatarIconController alloc] initWithBrowser:browser_.get()]);
   }
   view = [avatarButtonController_ view];
+  if (cocoa_l10n_util::ShouldFlipWindowControlsInRTL())
+    [view setAutoresizingMask:NSViewMaxXMargin | NSViewMinYMargin];
+  else
+    [view setAutoresizingMask:NSViewMinXMargin | NSViewMinYMargin];
   [view setHidden:![self shouldShowAvatar]];
 
   // Install the view.