Refactors building the system menu model into a common place

chrome/browser/ui/views/frame/browser_desktop_root_window_host_linux.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 "chrome/browser/ui/views/frame/browser_desktop_root_window_host_linux.h"
 
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserDesktopRootWindowHostLinux, public:
 
 BrowserDesktopRootWindowHostLinux::BrowserDesktopRootWindowHostLinux(
@@ skipping 14 matching lines @@
 
 views::DesktopRootWindowHost*
     BrowserDesktopRootWindowHostLinux::AsDesktopRootWindowHost() {
   return this;
 }
 
 int BrowserDesktopRootWindowHostLinux::GetMinimizeButtonOffset() const {
   return 0;
 }
 
+bool BrowserDesktopRootWindowHostLinux::UsesNativeSystemMenu() const {
+  return false;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserDesktopRootWindowHost, public:
 
 // static
 BrowserDesktopRootWindowHost*
     BrowserDesktopRootWindowHost::CreateBrowserDesktopRootWindowHost(
         views::internal::NativeWidgetDelegate* native_widget_delegate,
         views::DesktopNativeWidgetAura* desktop_native_widget_aura,
         const gfx::Rect& initial_bounds,
         BrowserView* browser_view,
         BrowserFrame* browser_frame) {
   return new BrowserDesktopRootWindowHostLinux(native_widget_delegate,
                                                desktop_native_widget_aura,
                                                initial_bounds);
 }