WidgetDelegateView is its own contents view.

ash/autoclick/mus/autoclick_application.cc

 // 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.
 
 #include "ash/autoclick/mus/autoclick_application.h"
 
 #include "ash/public/interfaces/container.mojom.h"
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "services/shell/public/cpp/connector.h"
@@ skipping 25 matching lines @@
     window_manager_connection_->pointer_watcher_event_router()
         ->AddPointerWatcher(this, true /* want_moves */);
   }
   ~AutoclickUI() override {
     window_manager_connection_->pointer_watcher_event_router()
         ->RemovePointerWatcher(this);
   }
 
  private:
   // Overridden from views::WidgetDelegate:
-  views::View* GetContentsView() override { return this; }
   base::string16 GetWindowTitle() const override {
     // TODO(beng): use resources.
     return base::ASCIIToUTF16("Autoclick");
   }
 
   // Overridden from views::PointerWatcher:
   void OnPointerEventObserved(const ui::PointerEvent& event,
                               const gfx::Point& location_in_screen,
                               views::Widget* target) override {
     if (event.IsTouchPointerEvent()) {
@@ skipping 97 matching lines @@
   // TODO(riajiang): Currently not working. Need to know how to generate events
   // in mus world (crbug.com/628665).
 }
 
 void AutoclickApplication::OnAutoclickCanceled() {
   // Not used in mus.
 }
 
 }  // namespace autoclick
 }  // namespace ash