Fixes aura unit tests. There were a couple of problems:

ui/aura_shell/desktop_layout_manager.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 "ui/aura_shell/desktop_layout_manager.h"
 
 #include "ui/aura/window.h"
 #include "views/widget/widget.h"
 
 namespace aura_shell {
 namespace internal {
 
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopLayoutManager, public:
 
 DesktopLayoutManager::DesktopLayoutManager(aura::Window* owner)
     : owner_(owner),
+      toplevel_window_container_(NULL),
       background_widget_(NULL),
       launcher_widget_(NULL),
       status_area_widget_(NULL) {
 }
 
 DesktopLayoutManager::~DesktopLayoutManager() {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // DesktopLayoutManager, aura::LayoutManager implementation:
@@ skipping 15 matching lines @@
   gfx::Rect status_area_bounds = status_area_widget_->GetWindowScreenBounds();
   status_area_widget_->SetBounds(
       gfx::Rect(owner_->bounds().right() - status_area_bounds.width(),
                 0,
                 status_area_bounds.width(),
                 status_area_bounds.height()));
 }
 
 }  // namespace internal
 }  // namespace aura_shell