Implement a MusBrowserFrame.

chrome/browser/ui/views/frame/mus_browser_frame.h

+// Copyright 2015 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_FRAME_MUS_BROWSER_FRAME_H_
+#define CHROME_BROWSER_UI_VIEWS_FRAME_MUS_BROWSER_FRAME_H_
+
+#include "base/macros.h"
+#include "chrome/browser/ui/views/frame/native_browser_frame.h"
+#include "ui/views/mus/native_widget_mus.h"
+
+class MusBrowserFrame : public NativeBrowserFrame,

[sky, 2015/11/06 17:07:46]

Should this be BrowserFrameMus? That seems more consistent with other names
we've gone with.

+                        public views::NativeWidgetMus {
+ public:
+  MusBrowserFrame(BrowserFrame* browser_frame, BrowserView* browser_view);
+  ~MusBrowserFrame() override;
+
+ private:
+  // Overridden from NativeBrowserFrame:
+  views::Widget::InitParams GetWidgetParams() override;
+  bool UseCustomFrame() const override;
+  bool UsesNativeSystemMenu() const override;
+  bool ShouldSaveWindowPlacement() const override;
+  void GetWindowPlacement(gfx::Rect* bounds,
+                          ui::WindowShowState* show_state) const override;
+  int GetMinimizeButtonOffset() const override;
+
+  BrowserView* browser_view_;
+
+  DISALLOW_COPY_AND_ASSIGN(MusBrowserFrame);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_FRAME_MUS_BROWSER_FRAME_H_