Move ash/wm's DialogFrameView to ui/views/window; etc.

ash/display/display_error_dialog.cc

 // Copyright (c) 2012 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/display/display_error_dialog.h"
 
 #include "ash/screen_ash.h"
 #include "ash/shell.h"
 #include "grit/ash_strings.h"
 #include "ui/aura/window.h"
@@ skipping 67 matching lines @@
 }
 
 int DisplayErrorDialog::GetDialogButtons() const {
   return ui::DIALOG_BUTTON_OK;
 }
 
 ui::ModalType DisplayErrorDialog::GetModalType() const {
   return ui::MODAL_TYPE_NONE;
 }
 
-views::View* DisplayErrorDialog::GetContentsView() {
-  return this;
-}
-
 gfx::Size DisplayErrorDialog::GetPreferredSize() {
   return label_->GetPreferredSize();
 }
 
 void DisplayErrorDialog::OnDisplayConfigurationChanging() {
   GetWidget()->Close();
 }
 
 }  // namespace internal
 }  // namespace ash