Make Widget ownership a little clearer by expressing it in terms of an enum.

chrome/browser/ui/views/tabs/dragged_tab_view.cc

 // Copyright (c) 2011 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/tabs/dragged_tab_view.h"
 
 #include "base/stl_util-inl.h"
 #include "chrome/browser/ui/views/tabs/native_view_photobooth.h"
 #include "third_party/skia/include/core/SkShader.h"
 #include "ui/gfx/canvas_skia.h"
@@ skipping 25 matching lines @@
       show_contents_on_drag_(true),
       mouse_tab_offset_(mouse_tab_offset),
       photobooth_(photobooth),
       contents_size_(contents_size) {
   set_parent_owned(false);
 
   container_.reset(new views::Widget);
   views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
   params.transparent = true;
   params.keep_on_top = true;
-  params.delete_on_destroy = false;
+  params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   params.bounds = gfx::Rect(PreferredContainerSize());
   container_->Init(params);
   container_->SetContentsView(this);
 #if defined(OS_WIN)
   static_cast<views::NativeWidgetWin*>(container_->native_widget())->
       set_can_update_layered_window(false);
 
   BOOL drag;
   if ((::SystemParametersInfo(SPI_GETDRAGFULLWINDOWS, 0, &drag, 0) != 0) &&
       (drag == FALSE)) {
@@ skipping 130 matching lines @@
 }
 
 gfx::Size DraggedTabView::PreferredContainerSize() {
   gfx::Size ps = GetPreferredSize();
   return gfx::Size(ScaleValue(ps.width()), ScaleValue(ps.height()));
 }
 
 int DraggedTabView::ScaleValue(int value) {
   return static_cast<int>(value * kScalingFactor);
 }