Implement a MusBrowserFrame.

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

+// 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.
+
+#include "chrome/browser/ui/views/frame/mus_browser_frame.h"
+
+#include "chrome/browser/ui/views/frame/browser_frame.h"
+#include "components/mus/public/interfaces/window_tree.mojom.h"
+#include "mojo/application/public/cpp/application_impl.h"
+#include "ui/views/mus/window_manager_connection.h"
+
+MusBrowserFrame::MusBrowserFrame(BrowserFrame* browser_frame,
+                                 BrowserView* browser_view)
+    : views::NativeWidgetMus(
+          browser_frame,
+          views::WindowManagerConnection::Get()->app()->shell(),
+          views::WindowManagerConnection::Get()->NewWindow(
+              std::map<std::string, std::vector<uint8_t>>()),
+          mus::mojom::SURFACE_TYPE_DEFAULT),
+      browser_view_(browser_view) {
+}
+MusBrowserFrame::~MusBrowserFrame() {}
+
+views::Widget::InitParams MusBrowserFrame::GetWidgetParams() {
+  views::Widget::InitParams params;
+  params.native_widget = this;
+  params.bounds = gfx::Rect(10, 10, 640, 480);
+  return params;
+}
+bool MusBrowserFrame::UseCustomFrame() const {

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

nit: more space!

+  return true;
+}
+bool MusBrowserFrame::UsesNativeSystemMenu() const {
+  return false;
+}
+bool MusBrowserFrame::ShouldSaveWindowPlacement() const {
+  return false;
+}
+void MusBrowserFrame::GetWindowPlacement(
+    gfx::Rect* bounds, ui::WindowShowState* show_state) const {
+  *bounds = gfx::Rect(10, 10, 800, 600);
+  *show_state = ui::SHOW_STATE_NORMAL;
+}
+int MusBrowserFrame::GetMinimizeButtonOffset() const {
+  return 0;
+}