Fixed brekage when PureViews are enable but Desktop is not

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

 // Copyright (c) 2011 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_gtk.h"
 
 #include "base/logging.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/themes/theme_service.h"
 #include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/browser/ui/status_bubble.h"
 #include "chrome/browser/ui/views/frame/app_panel_browser_frame_view.h"
 #include "chrome/browser/ui/views/frame/browser_frame_views.h"
 #include "chrome/browser/ui/views/frame/browser_non_client_frame_view.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "ui/gfx/font.h"
+#include "views/views_delegate.h"
 #include "views/widget/root_view.h"
 #include "views/widget/widget.h"
 #include "views/window/hit_test.h"
 
 // static
 const gfx::Font& BrowserFrame::GetTitleFont() {
   static gfx::Font *title_font = new gfx::Font();
   return *title_font;
 }
 
@@ skipping 57 matching lines @@
 }
 
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeBrowserFrame, public:
 
 // static
 NativeBrowserFrame* NativeBrowserFrame::CreateNativeBrowserFrame(
     BrowserFrame* browser_frame,
     BrowserView* browser_view) {
-  if (views::Widget::IsPureViews())
+  if (views::Widget::IsPureViews() &&
+      views::ViewsDelegate::views_delegate->GetDefaultParentView())
     return new BrowserFrameViews(browser_frame, browser_view);
   return new BrowserFrameGtk(browser_frame, browser_view);
 }