Rework the way Widget::Init works:

chrome/browser/chromeos/login/wizard_controller.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/chromeos/login/wizard_controller.h"
 
 #include <gdk/gdk.h>
 #include <signal.h>
 #include <sys/types.h>
 
@@ skipping 578 matching lines @@
 void WizardController::InitiateOOBEUpdate() {
   GetUpdateScreen()->StartUpdate();
   SetCurrentScreenSmooth(GetUpdateScreen(), true);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // WizardController, private:
 
 views::Widget* WizardController::CreateScreenWindow(
     const gfx::Rect& bounds, bool initial_show) {
-  views::Widget::CreateParams widget_params(
-      views::Widget::CreateParams::TYPE_WINDOW);
-  widget_params.transparent = true;
-  widget_ = views::Widget::CreateWidget(widget_params);
+  widget_ = views::Widget::CreateWidget();
   // Window transparency makes background flicker through controls that
   // are constantly updating its contents (like image view with video
   // stream). Hence enabling double buffer.
   static_cast<views::WidgetGtk*>(widget_)->EnableDoubleBuffer(true);
-  widget_->Init(NULL, bounds);
+  views::Widget::CreateParams widget_params(
+      views::Widget::CreateParams::TYPE_WINDOW);
+  widget_params.transparent = true;
+  widget_params.bounds = bounds;
+  widget_->Init(widget_params);
   std::vector<int> params;
   // For initial show WM would animate background window.
-  // Otherwise it stays unchaged.
+  // Otherwise it stays unchanged.
   params.push_back(initial_show);
   chromeos::WmIpc::instance()->SetWindowType(
       widget_->GetNativeView(),
       chromeos::WM_IPC_WINDOW_LOGIN_GUEST,
       &params);
   widget_->SetContentsView(contents_);
   return widget_;
 }
 
 gfx::Rect WizardController::GetWizardScreenBounds(int screen_width,
@@ skipping 270 matching lines @@
   return contents_;
 }
 
 chromeos::ScreenObserver* WizardController::GetObserver(WizardScreen* screen) {
   return observer_ ? observer_ : this;
 }
 
 void WizardController::SetZeroDelays() {
   kShowDelayMs = 0;
 }