views: fold layout_utils::CreatePanelLayout into GridLayout::CreatePanel

chrome/browser/ui/views/layout_utils.cc

-// Copyright 2016 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/layout_utils.h"
-
-#include "chrome/browser/ui/views/harmony/layout_delegate.h"
-#include "ui/views/view.h"
-
-namespace layout_utils {
-
-views::GridLayout* CreatePanelLayout(views::View* host) {
-  views::GridLayout* layout = new views::GridLayout(host);
-  LayoutDelegate* delegate = LayoutDelegate::Get();
-  layout->SetInsets(gfx::Insets(
-      delegate->GetMetric(LayoutDelegate::Metric::PANEL_CONTENT_MARGIN),
-      delegate->GetMetric(LayoutDelegate::Metric::DIALOG_BUTTON_MARGIN)));
-  host->SetLayoutManager(layout);
-  return layout;
-}
-
-}  // namespace layout_utils