Allow the Views Delegate to provide the native widget.

chrome/browser/ui/views/frame/browser_frame_aura.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_frame_aura.h"
 
+#include "base/command_line.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
+#include "chrome/browser/ui/views/frame/desktop_browser_frame_aura.h"
 #include "chrome/browser/ui/views/frame/system_menu_model_delegate.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/window.h"
 #include "ui/aura/window_observer.h"
 #include "ui/base/hit_test.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/models/simple_menu_model.h"
 #include "ui/gfx/font.h"
 #include "ui/views/controls/menu/menu_model_adapter.h"
 #include "ui/views/controls/menu/menu_runner.h"
 #include "ui/views/view.h"
+#include "ui/views/views_switches.h"
 
 #if defined(USE_ASH)
 #include "ash/wm/property_util.h"
 #endif
 
 using aura::Window;
 
 ////////////////////////////////////////////////////////////////////////////////
 // BrowserFrameAura::WindowPropertyWatcher
 
@@ skipping 148 matching lines @@
   return *title_font;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeBrowserFrame, public:
 
 // static
 NativeBrowserFrame* NativeBrowserFrame::CreateNativeBrowserFrame(
     BrowserFrame* browser_frame,
     BrowserView* browser_view) {
+  if (CommandLine::ForCurrentProcess()->HasSwitch(views::switches::kWinAura))
+    return new DesktopBrowserFrameAura(browser_frame, browser_view);
   return new BrowserFrameAura(browser_frame, browser_view);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // BrowserFrameAura, private:
 
 BrowserFrameAura::~BrowserFrameAura() {
 }