Fix crash under ExclusiveAccessBubbleViews::AnimationProgressed().

chrome/browser/ui/exclusive_access/fullscreen_controller_test.cc

 // 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.
 
 #include "chrome/browser/ui/exclusive_access/fullscreen_controller_test.h"
 
 #include "base/command_line.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_window.h"
@@ skipping 70 matching lines @@
 void FullscreenControllerTest::Reload() {
   content::TestNavigationObserver observer(
       browser()->tab_strip_model()->GetActiveWebContents(), 1);
   chrome::Reload(browser(), WindowOpenDisposition::CURRENT_TAB);
   observer.Wait();
 }
 
 void FullscreenControllerTest::SetPrivilegedFullscreen(bool is_privileged) {
   GetFullscreenController()->SetPrivilegedFullscreenForTesting(is_privileged);
 }
+
+void FullscreenControllerTest::EnterActiveTabFullscreen() {
+  WebContents* tab = browser()->tab_strip_model()->GetActiveWebContents();
+  FullscreenNotificationObserver fullscreen_observer;
+  browser()->EnterFullscreenModeForTab(tab, GURL());
+  fullscreen_observer.Wait();
+}