Broke out layout metric information from ViewsDelegate to LayoutProvider

chrome/browser/ui/views/harmony/harmony_layout_delegate.h

-// 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.
-
-#ifndef CHROME_BROWSER_UI_VIEWS_HARMONY_HARMONY_LAYOUT_DELEGATE_H_
-#define CHROME_BROWSER_UI_VIEWS_HARMONY_HARMONY_LAYOUT_DELEGATE_H_
-
-#include "chrome/browser/ui/views/harmony/layout_delegate.h"
-
-class HarmonyLayoutDelegate : public LayoutDelegate {
- public:
-  // The Harmony layout unit. All distances are in terms of this unit.
-  static constexpr int kHarmonyLayoutUnit = 16;
-
-  HarmonyLayoutDelegate() {}
-  ~HarmonyLayoutDelegate() override {}
-
-  // Returns the singleton HarmonyLayoutDelegate instance.
-  static HarmonyLayoutDelegate* Get();
-
-  // views::LayoutDelegate:
-  int GetMetric(Metric metric) const override;
-  views::GridLayout::Alignment GetControlLabelGridAlignment() const override;
-  bool UseExtraDialogPadding() const override;
-  bool IsHarmonyMode() const override;
-  int GetDialogPreferredWidth(DialogWidth width) const override;
-  bool ShouldShowWindowIcon() const override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(HarmonyLayoutDelegate);
-};
-
-#endif  // CHROME_BROWSER_UI_VIEWS_HARMONY_HARMONY_LAYOUT_DELEGATE_H_