mash: Convert WebNotificationTray to wm common types

ui/message_center/views/toast_contents_view.h

Index: ui/message_center/views/toast_contents_view.h
diff --git a/ui/message_center/views/toast_contents_view.h b/ui/message_center/views/toast_contents_view.h
index d69a360e1d939d4de2bc657325a386a934140e28..552227bb804f1203b3f0690fa423941ae1816483 100644
--- a/ui/message_center/views/toast_contents_view.h
+++ b/ui/message_center/views/toast_contents_view.h
@@ -12,7 +12,6 @@
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
-#include "ui/gfx/native_widget_types.h"
 #include "ui/message_center/views/message_center_controller.h"
 #include "ui/views/widget/widget_delegate.h"
 
@@ -34,6 +33,7 @@ class MessagePopupCollectionTest;
 class MessagePopupCollection;
 class MessageView;
 class Notification;
+class PopupAlignmentDelegate;
 
 // The widget host for a popup. Also implements MessageCenterController
 // which delegates over to MessagePopupCollection, but takes care about
@@ -47,6 +47,7 @@ class ToastContentsView : public views::WidgetDelegateView,
   static gfx::Size GetToastSizeForView(const views::View* view);
 
   ToastContentsView(const std::string& notification_id,
+                    PopupAlignmentDelegate* alignment_delegate,
                     base::WeakPtr<MessagePopupCollection> collection);
   ~ToastContentsView() override;
 
@@ -112,7 +113,7 @@ class ToastContentsView : public views::WidgetDelegateView,
   void UpdatePreferredSize();
 
   // Initialization and update.
-  void CreateWidget(gfx::NativeView parent);
+  void CreateWidget(PopupAlignmentDelegate* alignment_delegate);
 
   // Immediately moves the toast without any sort of delay or animation.
   void SetBoundsInstantly(gfx::Rect new_bounds);