aura: Destroy the compositor before destroying the backing window.

ui/views/widget/desktop_aura/desktop_root_window_host_x11.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_x11.h"
 
 #include <X11/extensions/shape.h>
 #include <X11/extensions/XInput2.h>
 #include <X11/Xatom.h>
 #include <X11/Xregion.h>
@@ skipping 124 matching lines @@
       drag_drop_client_(NULL),
       current_cursor_(ui::kCursorNull),
       native_widget_delegate_(native_widget_delegate),
       desktop_native_widget_aura_(desktop_native_widget_aura),
       content_window_(NULL),
       window_parent_(NULL),
       custom_window_shape_(NULL) {
 }
 
 DesktopWindowTreeHostX11::~DesktopWindowTreeHostX11() {
-  DestroyCompositor();
   root_window_->window()->ClearProperty(kHostForRootWindow);
   aura::client::SetWindowMoveClient(root_window_->window(), NULL);
   desktop_native_widget_aura_->OnDesktopWindowTreeHostDestroyed(root_window_);
   if (custom_window_shape_)
     XDestroyRegion(custom_window_shape_);
 }
 
 // static
 aura::Window* DesktopWindowTreeHostX11::GetContentWindowForXID(XID xid) {
   aura::RootWindow* root = aura::RootWindow::GetForAcceleratedWidget(xid);
@@ skipping 157 matching lines @@
   if (window_parent_) {
     window_parent_->window_children_.erase(this);
     window_parent_ = NULL;
   }
 
   // Remove the event listeners we've installed. We need to remove these
   // because otherwise we get assert during ~RootWindow().
   desktop_native_widget_aura_->root_window_event_filter()->RemoveHandler(
       x11_window_event_filter_.get());
 
+  // Destroy the compositor before destroying the |xwindow_| since shutdown
+  // may try to swap, and the swap without a window causes an X error, which
+  // causes a crash with in-process renderer.
+  DestroyCompositor();
+
   open_windows().remove(xwindow_);
   // Actually free our native resources.
   base::MessagePumpX11::Current()->RemoveDispatcherForWindow(xwindow_);
   XDestroyWindow(xdisplay_, xwindow_);
   xwindow_ = None;
 
   desktop_native_widget_aura_->OnHostClosed();
 }
 
 aura::WindowTreeHost* DesktopWindowTreeHostX11::AsWindowTreeHost() {
@@ skipping 1213 matching lines @@
   if (linux_ui) {
     ui::NativeTheme* native_theme = linux_ui->GetNativeTheme();
     if (native_theme)
       return native_theme;
   }
 
   return ui::NativeTheme::instance();
 }
 
 }  // namespace views