Fix a bug of PopupAlignmentDelegate on non-primary display

ash/system/web_notification/web_notification_tray_unittest.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 "ash/common/system/web_notification/web_notification_tray.h"
 
 #include <utility>
 #include <vector>
 
 #include "ash/common/shelf/shelf_layout_manager.h"
@@ skipping 122 matching lines @@
     GetMessageCenter()->RemoveNotification(id, false);
   }
 
   views::Widget* GetWidget() { return GetTray()->GetWidget(); }
 
   int GetPopupWorkAreaBottom() {
     return GetPopupWorkAreaBottomForTray(GetTray());
   }
 
   int GetPopupWorkAreaBottomForTray(WebNotificationTray* tray) {
-    return tray->popup_alignment_delegate_->GetWorkAreaBottom();
+    return tray->popup_alignment_delegate_->GetWorkArea().bottom();
   }
 
   bool IsPopupVisible() { return GetTray()->IsPopupVisible(); }
 
   static std::unique_ptr<views::Widget> CreateTestWidget() {
     return AshTestBase::CreateTestWidget(
         nullptr, kShellWindowId_DefaultContainer, gfx::Rect(1, 2, 3, 4));
   }
 
   static void UpdateAutoHideStateNow() {
@@ skipping 361 matching lines @@
   EXPECT_FALSE(tray->draw_background_as_active());
 
   generator.ReleaseTouch();
   EXPECT_FALSE(tray->draw_background_as_active());
   EXPECT_FALSE(tray->IsMessageCenterBubbleVisible());
 }
 
 #endif  // OS_CHROMEOS
 
 }  // namespace ash