Use MD-ash's auto hide behavior for arc++ windows.

chrome/browser/chromeos/login/lock/screen_locker_browsertest.cc

 // Copyright 2014 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/chromeos/login/lock/screen_locker.h"
 
 #include <memory>
 
 #include "ash/common/wm/window_state.h"
 #include "ash/wm/window_state_aura.h"
@@ skipping 185 matching lines @@
   ash::wm::WindowState* window_state = ash::wm::GetWindowState(
       browser_window->GetNativeWindow());
   {
     Waiter waiter(browser());
     browser()
         ->exclusive_access_manager()
         ->fullscreen_controller()
         ->ToggleBrowserFullscreenMode();
     waiter.Wait(false /* not locked */, true /* full screen */);
     EXPECT_TRUE(browser_window->IsFullscreen());
-    EXPECT_FALSE(window_state->hide_shelf_when_fullscreen());
+    EXPECT_NE(ash::wm::WindowState::SHELF_HIDDEN,
+              window_state->shelf_mode_in_fullscreen());
     EXPECT_FALSE(tester->IsLocked());
   }
   {
     Waiter waiter(browser());
     ScreenLocker::Show();
     tester->EmulateWindowManagerReady();
     waiter.Wait(true /* locked */, true /* full screen */);
     EXPECT_TRUE(browser_window->IsFullscreen());
-    EXPECT_FALSE(window_state->hide_shelf_when_fullscreen());
+    EXPECT_NE(ash::wm::WindowState::SHELF_HIDDEN,
+              window_state->shelf_mode_in_fullscreen());
     EXPECT_TRUE(tester->IsLocked());
   }
   UserContext user_context(login::StubAccountId());
   user_context.SetKey(Key("pass"));
   tester->InjectStubUserContext(user_context);
   tester->EnterPassword("pass");
   content::RunAllPendingInMessageLoop();
   EXPECT_FALSE(tester->IsLocked());
   {
     Waiter waiter(browser());
@@ skipping 11 matching lines @@
   {
     Waiter waiter(browser());
     content::WebContents* web_contents =
         browser()->tab_strip_model()->GetActiveWebContents();
     browser()
         ->exclusive_access_manager()
         ->fullscreen_controller()
         ->EnterFullscreenModeForTab(web_contents, GURL());
     waiter.Wait(false /* not locked */, true /* fullscreen */);
     EXPECT_TRUE(browser_window->IsFullscreen());
-    EXPECT_TRUE(window_state->hide_shelf_when_fullscreen());
+    EXPECT_EQ(ash::wm::WindowState::SHELF_HIDDEN,
+              window_state->shelf_mode_in_fullscreen());
     EXPECT_FALSE(tester->IsLocked());
   }
   {
     Waiter waiter(browser());
     ScreenLocker::Show();
     tester->EmulateWindowManagerReady();
     waiter.Wait(true /* locked */, false /* full screen */);
     EXPECT_FALSE(browser_window->IsFullscreen());
     EXPECT_TRUE(tester->IsLocked());
   }
@@ skipping 56 matching lines @@
   EXPECT_EQ("", tester->GetPassword());
 
   // Close the locker to match expectations.
   ScreenLocker::Hide();
   content::RunAllPendingInMessageLoop();
   EXPECT_FALSE(tester->IsLocked());
   EXPECT_TRUE(VerifyLockScreenDismissed());
 }
 
 }  // namespace chromeos