Separate ash::test::DisplayManagerTestApi from ash

chrome/browser/ui/ash/system_tray_delegate_chromeos_browsertest_chromeos.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/ui/ash/system_tray_delegate_chromeos.h"
 
 #include <string>
 
 #include "ash/common/system/date/date_default_view.h"
 #include "ash/common/system/date/date_view.h"
@@ skipping 50 matching lines @@
 }  // namespace
 
 class DisplayNotificationsTest : public InProcessBrowserTest {
  public:
   DisplayNotificationsTest() {}
   ~DisplayNotificationsTest() override {}
 
   void SetUp() override { InProcessBrowserTest::SetUp(); }
 
   void UpdateDisplay(const std::string& display_specs) {
-    ash::test::DisplayManagerTestApi().UpdateDisplay(display_specs);
+    ash::test::DisplayManagerTestApi(
+        ash::Shell::GetInstance()->display_manager())
+        .UpdateDisplay(display_specs);
   }
 
   message_center::NotificationList::Notifications GetVisibleNotifications()
       const {
     return message_center::MessageCenter::Get()->GetVisibleNotifications();
   }
 };
 
 class SystemTrayDelegateChromeOSTest : public LoginManagerTest {
  protected:
@@ skipping 77 matching lines @@
 
   UpdateDisplay("400x400");
 
   ui_test_utils::NavigateToURL(browser(), GURL("chrome://version"));
   UpdateDisplay("400x400/r");
   // Ensure that there is a notification that is shown.
   EXPECT_FALSE(GetVisibleNotifications().empty());
 }
 
 }  // namespace chromeos