Use the native frame for the task manager on Linux Aura

ui/views/window/dialog_delegate.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 "ui/views/window/dialog_delegate.h"
 
 #include "base/logging.h"
 #include "grit/ui_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/views/bubble/bubble_border.h"
@@ skipping 16 matching lines @@
 Widget* DialogDelegate::CreateDialogWidget(DialogDelegate* dialog,
                                            gfx::NativeView context,
                                            gfx::NativeView parent) {
   views::Widget* widget = new views::Widget;
   views::Widget::InitParams params;
   params.delegate = dialog;
   if (!dialog || dialog->UseNewStyleForThisDialog()) {
     params.opacity = Widget::InitParams::TRANSLUCENT_WINDOW;
     params.remove_standard_frame = true;
   }
-#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
-  // Dialogs on Linux always have custom frames.
-  params.remove_standard_frame = true;
-#endif
   params.context = context;
   params.parent = parent;
   params.top_level = true;
   widget->Init(params);
   return widget;
 }
 
 View* DialogDelegate::CreateExtraView() {
   return NULL;
 }
@@ skipping 156 matching lines @@
 
 const Widget* DialogDelegateView::GetWidget() const {
   return View::GetWidget();
 }
 
 View* DialogDelegateView::GetContentsView() {
   return this;
 }
 
 }  // namespace views