WidgetDelegateView is its own contents view.

chrome/browser/ui/views/autofill/autofill_popup_base_view.cc

 // Copyright 2014 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 "chrome/browser/ui/views/autofill/autofill_popup_base_view.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 35 matching lines @@
         this);
 
     // The widget is destroyed by the corresponding NativeWidget, so we use
     // a weak pointer to hold the reference and don't have to worry about
     // deletion.
     views::Widget* widget = new views::Widget;
     views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
     params.delegate = this;
     params.parent = parent_widget_->GetNativeView();
     widget->Init(params);
-    widget->SetContentsView(this);
 
     // No animation for popup appearance (too distracting).
     widget->SetVisibilityAnimationTransition(views::Widget::ANIMATE_HIDE);
 
     show_time_ = base::Time::Now();
   }
 
   SetBorder(views::Border::CreateSolidBorder(kPopupBorderThickness,
                                              kBorderColor));
 
@@ skipping 165 matching lines @@
 void AutofillPopupBaseView::HideController() {
   if (delegate_)
     delegate_->Hide();
 }
 
 gfx::NativeView AutofillPopupBaseView::container_view() {
   return delegate_->container_view();
 }
 
 }  // namespace autofill