mash: Remove StatusAreaWidget references from system tray classes

ash/common/system/web_notification/web_notification_tray.h

Index: ash/common/system/web_notification/web_notification_tray.h
diff --git a/ash/system/web_notification/web_notification_tray.h b/ash/common/system/web_notification/web_notification_tray.h
similarity index 93%
rename from ash/system/web_notification/web_notification_tray.h
rename to ash/common/system/web_notification/web_notification_tray.h
index f36246329f2b1113395dbb28bfc57e6c065aed3d..42d0e7bd82c525fa4019086742a3f4c282acefd3 100644
--- a/ash/system/web_notification/web_notification_tray.h
+++ b/ash/common/system/web_notification/web_notification_tray.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ASH_SYSTEM_WEB_NOTIFICATION_WEB_NOTIFICATION_TRAY_H_
-#define ASH_SYSTEM_WEB_NOTIFICATION_WEB_NOTIFICATION_TRAY_H_
+#ifndef ASH_COMMON_SYSTEM_WEB_NOTIFICATION_WEB_NOTIFICATION_TRAY_H_
+#define ASH_COMMON_SYSTEM_WEB_NOTIFICATION_WEB_NOTIFICATION_TRAY_H_
 
 #include <memory>
 
@@ -40,10 +40,12 @@ class MessagePopupCollection;
 }
 
 namespace ash {
-class StatusAreaWidget;
+class AshPopupAlignmentDelegate;
+class SystemTray;
 class WebNotificationBubbleWrapper;
 class WebNotificationButton;
-class AshPopupAlignmentDelegate;
+class WmShelf;
+class WmWindow;
 
 class ASH_EXPORT WebNotificationTray
     : public TrayBackgroundView,
@@ -53,7 +55,9 @@ class ASH_EXPORT WebNotificationTray
       public base::SupportsWeakPtr<WebNotificationTray>,
       public ui::SimpleMenuModel::Delegate {
  public:
-  explicit WebNotificationTray(StatusAreaWidget* status_area_widget);
+  WebNotificationTray(WmShelf* shelf,
+                      WmWindow* status_area_window,
+                      SystemTray* system_tray);
   ~WebNotificationTray() override;
 
   // Sets the height of the system tray from the edge of the work area so that
@@ -169,7 +173,8 @@ class ASH_EXPORT WebNotificationTray
   bool IsPopupVisible() const;
   message_center::MessageCenterBubble* GetMessageCenterBubbleForTest();
 
-  StatusAreaWidget* status_area_widget_;
+  WmWindow* status_area_window_;
+  SystemTray* system_tray_;
   std::unique_ptr<message_center::MessageCenterTray> message_center_tray_;
   std::unique_ptr<WebNotificationBubbleWrapper> message_center_bubble_;
   std::unique_ptr<message_center::MessagePopupCollection> popup_collection_;
@@ -192,4 +197,4 @@ class ASH_EXPORT WebNotificationTray
 
 }  // namespace ash
 
-#endif  // ASH_SYSTEM_WEB_NOTIFICATION_WEB_NOTIFICATION_TRAY_H_
+#endif  // ASH_COMMON_SYSTEM_WEB_NOTIFICATION_WEB_NOTIFICATION_TRAY_H_