mash: Remove WmWindow usage from ash/system/web_notification

ui/views/bubble/tray_bubble_view.h

 // 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.
 
 #ifndef UI_VIEWS_BUBBLE_TRAY_BUBBLE_VIEW_H_
 #define UI_VIEWS_BUBBLE_TRAY_BUBBLE_VIEW_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 45 matching lines @@
     // the user to enter the view.
     virtual void OnMouseEnteredView() = 0;
     virtual void OnMouseExitedView() = 0;
 
     // Called from GetAccessibleNodeData(); should return the appropriate
     // accessible name for the bubble.
     virtual base::string16 GetAccessibleNameForBubble() = 0;
 
     // Called before Widget::Init() on |bubble_widget|. Allows |params| to be
     // modified.
+    // TODO(jamescook): Eliminate this method. It was introduced to let mash set

[msw, 2017/05/15 22:50:11]

aside: oooh, that would be nice!

+    // the widget container back when mash could not use aura::Window. Now the
+    // anchor view should be sufficient.
     virtual void OnBeforeBubbleWidgetInit(Widget* anchor_widget,
                                           Widget* bubble_widget,
                                           Widget::InitParams* params) const = 0;
 
     // Called when a bubble wants to hide/destroy itself (e.g. last visible
     // child view was closed).
     virtual void HideBubble(const TrayBubbleView* bubble_view) = 0;
 
    private:
     DISALLOW_COPY_AND_ASSIGN(Delegate);
@@ skipping 103 matching lines @@
 
   // Used to find any mouse movements.
   std::unique_ptr<MouseWatcher> mouse_watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayBubbleView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_BUBBLE_TRAY_BUBBLE_VIEW_H_