Rework the way Widget::Init works:

chrome/browser/ui/views/theme_install_bubble_view.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/theme_install_bubble_view.h"
 
 #include "base/utf_string_conversions.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/common/notification_service.h"
 #include "grit/generated_resources.h"
@@ skipping 52 matching lines @@
       this,
       NotificationType::EXTENSION_INSTALL_ERROR,
       NotificationService::AllSources());
 
   // Don't let the bubble overlap the confirm dialog.
   registrar_.Add(
       this,
       NotificationType::EXTENSION_WILL_SHOW_CONFIRM_DIALOG,
       NotificationService::AllSources());
 
-  gfx::Rect rc(0, 0, 0, 0);
+  popup_ = views::Widget::CreateWidget();
+  popup_->SetOpacity(0xCC);
   views::Widget::CreateParams params(views::Widget::CreateParams::TYPE_POPUP);
   params.transparent = true;
   params.accept_events = false;
-  popup_ = views::Widget::CreateWidget(params);
-  popup_->SetOpacity(0xCC);
-  popup_->Init(tab_contents->GetNativeView(), rc);
+  params.parent = tab_contents->GetNativeView();
+  popup_->Init(params);
   popup_->SetContentsView(this);
   Reposition();
   popup_->Show();
 
   SchedulePaint();
 }
 
 ThemeInstallBubbleView::~ThemeInstallBubbleView() {
   num_loads_extant_ = 0;
 }
@@ skipping 71 matching lines @@
                                      const NotificationDetails& details) {
   Close();
 }
 
 // static
 void ThemeInstallBubbleView::Show(TabContents* tab_contents) {
   ++num_loads_extant_;
   if (num_loads_extant_ < 2)
     new ThemeInstallBubbleView(tab_contents);
 }