Rework the way Widget::Init works:

chrome/browser/external_tab_container_win.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/external_tab_container_win.h"
 
 #include <string>
 
 #include "base/debug/trace_event.h"
 #include "base/i18n/rtl.h"
@@ skipping 116 matching lines @@
     NOTREACHED();
     return false;
   }
 
   load_requests_via_automation_ = load_requests_via_automation;
   handle_top_level_requests_ = handle_top_level_requests;
   infobars_enabled_ = infobars_enabled;
   route_all_top_level_navigations_ = route_all_top_level_navigations;
 
   set_window_style(WS_POPUP | WS_CLIPCHILDREN);
-  views::WidgetWin::Init(NULL, bounds);
+
+  views::Widget::CreateParams params(views::Widget::CreateParams::TYPE_POPUP);
+  params.bounds = bounds;
+  GetWidget()->Init(params);
   if (!IsWindow()) {
     NOTREACHED();
     return false;
   }
 
   // TODO(jcampan): limit focus traversal to contents.
 
   prop_.reset(new ViewProp(GetNativeView(), kWindowObjectKey, this));
 
   if (existing_contents) {
@@ skipping 961 matching lines @@
 
   if (disposition == CURRENT_TAB) {
     DCHECK(route_all_top_level_navigations_);
     disposition = NEW_FOREGROUND_TAB;
   }
   ExternalTabContainer::OpenURLFromTab(source, url, referrer, disposition,
                                        transition);
   // support only one navigation for a dummy tab before it is killed.
   ::DestroyWindow(GetNativeView());
 }