Fix stale compositor references from ui::Layer

ui/aura/window.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/window.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
@@ skipping 53 matching lines @@
   // And let the delegate do any post cleanup.
   if (delegate_)
     delegate_->OnWindowDestroyed();
   if (parent_)
     parent_->RemoveChild(this);
 
   FOR_EACH_OBSERVER(WindowObserver, observers_, OnWindowDestroyed(this));
 }
 
 void Window::Init(ui::Layer::LayerType layer_type) {
-  layer_.reset(new ui::Layer(Desktop::GetInstance()->compositor(), layer_type));
+  layer_.reset(new ui::Layer(layer_type));
   layer_->SetVisible(false);
   layer_->set_delegate(this);
 }
 
 void Window::SetType(WindowType type) {
   // Cannot change type after the window is initialized.
   DCHECK(!layer());
   type_ = type;
 }
 
@@ skipping 404 matching lines @@
 
   return delegate_ ? this : NULL;
 }
 
 void Window::OnPaintLayer(gfx::Canvas* canvas) {
   if (delegate_)
     delegate_->OnPaint(canvas);
 }
 
 }  // namespace aura