Convert TrayEventFilter to wm common types

ash/container_delegate.h

Index: ash/container_delegate.h
diff --git a/ash/container_delegate.h b/ash/container_delegate.h
deleted file mode 100644
index d0d65c35f70bb88cf4792537a99af9804ae2e8f9..0000000000000000000000000000000000000000
--- a/ash/container_delegate.h
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright 2016 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 ASH_CONTAINER_DELEGATE_H_
-#define ASH_CONTAINER_DELEGATE_H_
-
-#include "ash/ash_export.h"
-
-namespace views {
-class Widget;
-}
-
-namespace ash {
-
-// Allows access to the window container hierarchy, which differs between
-// classic ash (where ash itself manages the hierarchy) and mus (where the
-// window manager manages the hierarchy).
-class ASH_EXPORT ContainerDelegate {
- public:
-  virtual ~ContainerDelegate() {}
-
-  virtual bool IsInMenuContainer(views::Widget* widget) = 0;
-  virtual bool IsInStatusContainer(views::Widget* widget) = 0;
-};
-
-}  // namespace ash
-
-#endif  // ASH_CONTAINER_DELEGATE_H_