aura: Destroy the compositor before destroying the backing window.

ui/views/widget/desktop_aura/desktop_root_window_host_win.cc

 // Copyright (c) 2012 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/views/widget/desktop_aura/desktop_root_window_host_win.h"
 
 #include "base/win/metro.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 70 matching lines @@
       content_window_(NULL),
       drag_drop_client_(NULL),
       should_animate_window_close_(false),
       pending_close_(false),
       has_non_client_view_(false),
       tooltip_(NULL),
       is_cursor_visible_(true) {
 }
 
 DesktopWindowTreeHostWin::~DesktopWindowTreeHostWin() {
-  DestroyCompositor();
   // WARNING: |content_window_| has been destroyed by the time we get here.
   desktop_native_widget_aura_->OnDesktopWindowTreeHostDestroyed(
       root_window_);
 }
 
 // static
 aura::Window* DesktopWindowTreeHostWin::GetContentWindowForHWND(HWND hwnd) {
   aura::RootWindow* root = aura::RootWindow::GetForAcceleratedWidget(hwnd);
   return root ? root->window()->GetProperty(kContentWindowForRootWindow) : NULL;
 }
@@ skipping 656 matching lines @@
 
   native_widget_delegate_->OnNativeWidgetCreated(true);
 
   // 1. Window property association
   // 2. MouseWheel.
 }
 
 void DesktopWindowTreeHostWin::HandleDestroying() {
   drag_drop_client_->OnNativeWidgetDestroying(GetHWND());
   native_widget_delegate_->OnNativeWidgetDestroying();
+
+  // Destroy the compositor before destroying the HWND since shutdown
+  // may try to swap to the window.
+  DestroyCompositor();
 }
 
 void DesktopWindowTreeHostWin::HandleDestroyed() {
   desktop_native_widget_aura_->OnHostClosed();
+  DCHECK_EQ(static_cast<HWND>(NULL), GetHWND());
 }
 
 bool DesktopWindowTreeHostWin::HandleInitialFocus() {
   return GetWidget()->SetInitialFocus();
 }
 
 void DesktopWindowTreeHostWin::HandleDisplayChange() {
   GetWidget()->widget_delegate()->OnDisplayChanged();
 }
 
@@ skipping 203 matching lines @@
 
 // static
 DesktopWindowTreeHost* DesktopWindowTreeHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura) {
   return new DesktopWindowTreeHostWin(native_widget_delegate,
                                       desktop_native_widget_aura);
 }
 
 }  // namespace views