[Mac RTL] Only tie the avatar button to the left side of the screen when it's moved to that side.

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 9af374e6fbd853e6737c09108988f14395f940e8..8ddd5622038b2aef11caba5d9b1ef15d45a81cc3 100644
--- a/chrome/browser/ui/cocoa/browser_window_controller.mm
+++ b/chrome/browser/ui/cocoa/browser_window_controller.mm
@@ -1651,10 +1651,6 @@ bool IsTabDetachingInFullscreenEnabled() {
       [[AvatarIconController alloc] initWithBrowser:browser_.get()]);
   }
   view = [avatarButtonController_ view];
-  if (cocoa_l10n_util::ShouldDoExperimentalRTLLayout())
-    [view setAutoresizingMask:NSViewMaxXMargin | NSViewMinYMargin];
-  else
-    [view setAutoresizingMask:NSViewMinXMargin | NSViewMinYMargin];
   [view setHidden:![self shouldShowAvatar]];
 
   // Install the view.