Remove the idle action warning dialog extra border.

chrome/browser/chromeos/power/idle_action_warning_dialog_view.cc

 // Copyright 2013 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/chromeos/power/idle_action_warning_dialog_view.h"
 
 #include "ash/shell.h"
 #include "grit/generated_resources.h"
 #include "ui/aura/root_window.h"
 #include "ui/base/l10n/l10n_util.h"
@@ skipping 51 matching lines @@
         views::kPanelVertMargin, views::kButtonHEdgeMarginNew,
         views::kPanelVertMargin, views::kButtonHEdgeMarginNew));
   } else {
     content->set_border(views::Border::CreateEmptyBorder(
         views::kPanelVertMargin, views::kPanelHorizMargin,
         views::kPanelVertMargin, views::kPanelHorizMargin));
   }
   AddChildView(content);
   SetLayoutManager(new views::FillLayout());
 
-  views::Widget::CreateWindowWithContext(this,
-                                         ash::Shell::GetPrimaryRootWindow());
-  GetWidget()->Show();
+  views::DialogDelegate::CreateDialogWidget(
+      this, ash::Shell::GetPrimaryRootWindow(), NULL)->Show();
 }
 
 void IdleActionWarningDialogView::Close() {
   closing_ = true;
   GetDialogClientView()->CancelWindow();
 }
 
 ui::ModalType IdleActionWarningDialogView::GetModalType() const {
   return ui::MODAL_TYPE_SYSTEM;
 }
 
 string16 IdleActionWarningDialogView::GetWindowTitle() const {
   return l10n_util::GetStringUTF16(IDS_IDLE_WARNING_TITLE);
 }
 
 int IdleActionWarningDialogView::GetDialogButtons() const {
   return ui::DIALOG_BUTTON_NONE;
 }
 
 bool IdleActionWarningDialogView::Cancel() {
   return closing_;
 }
 
 IdleActionWarningDialogView::~IdleActionWarningDialogView() {
 }
 
 }  // namespace chromeos