Fix flaky menubar in BrowserWindowController browser test

chrome/browser/ui/cocoa/browser_window_controller_browsertest.mm

 // Copyright (c) 2012 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_controller.h"
 
 #include <stddef.h>
 #import "base/mac/mac_util.h"
 
 #include "base/mac/sdk_forward_declarations.h"
@@ skipping 690 matching lines @@
   PrefService* prefs = browser()->profile()->GetPrefs();
   EXPECT_TRUE(prefs->GetBoolean(prefs::kShowFullscreenToolbar));
 
   // Toggle fullscreen and check if the toolbar is shown.
   ToggleFullscreenAndWaitForNotification();
   VerifyFullscreenToolbarVisibility(fullscreen_mac::OMNIBOX_TABS_PRESENT);
 
   // Toggle the visibility of the fullscreen toolbar. Verify that the toolbar
   // is hidden and the preference is correctly updated.
   [[controller() presentationModeController] setToolbarFraction:0.0];
+  [[controller() presentationModeController] setMenuBarRevealProgress:0.0];
   chrome::ExecuteCommand(browser(), IDC_TOGGLE_FULLSCREEN_TOOLBAR);
   EXPECT_FALSE(prefs->GetBoolean(prefs::kShowFullscreenToolbar));
   VerifyFullscreenToolbarVisibility(fullscreen_mac::OMNIBOX_TABS_HIDDEN);
 
   // Toggle out and back into fullscreen and verify that the toolbar is still
   // hidden.
   ToggleFullscreenAndWaitForNotification();
   ToggleFullscreenAndWaitForNotification();
+  [[controller() presentationModeController] setMenuBarRevealProgress:0.0];
   VerifyFullscreenToolbarVisibility(fullscreen_mac::OMNIBOX_TABS_HIDDEN);
 
   chrome::ExecuteCommand(browser(), IDC_TOGGLE_FULLSCREEN_TOOLBAR);
   EXPECT_TRUE(prefs->GetBoolean(prefs::kShowFullscreenToolbar));
 }