Ozone DRM: Destroy MusThreadProxy last.

ui/ozone/platform/drm/ozone_platform_gbm.cc

 // Copyright 2014 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/ozone/platform/drm/ozone_platform_gbm.h"
 
 #include <dlfcn.h>
 #include <fcntl.h>
 #include <gbm.h>
 #include <stdlib.h>
@@ skipping 221 matching lines @@
     }
     for (auto& request : pending_cursor_requests_)
       drm_thread_proxy_->AddBinding(std::move(request));
     pending_cursor_requests_.clear();
   }
 
  private:
   bool using_mojo_;
   bool single_process_;
 
+  // Bridges the DRM, GPU and main threads in mus. This must be destroyed last.
+  std::unique_ptr<MusThreadProxy> mus_thread_proxy_;
+
   // Objects in the GPU process.
   std::unique_ptr<DrmThreadProxy> drm_thread_proxy_;
   std::unique_ptr<GlApiLoader> gl_api_loader_;
   std::unique_ptr<GbmSurfaceFactory> surface_factory_;
   scoped_refptr<IPC::MessageFilter> gpu_message_filter_;
   // TODO(sad): Once the mus gpu process split happens, this can go away.
   std::vector<ozone::mojom::DeviceCursorRequest> pending_cursor_requests_;
 
   // Objects in the Browser process.
   std::unique_ptr<DeviceManager> device_manager_;
   std::unique_ptr<BitmapCursorFactoryOzone> cursor_factory_ozone_;
   std::unique_ptr<DrmWindowHostManager> window_manager_;
   std::unique_ptr<DrmCursor> cursor_;
   std::unique_ptr<EventFactoryEvdev> event_factory_ozone_;
   std::unique_ptr<DrmGpuPlatformSupportHost> gpu_platform_support_host_;
   std::unique_ptr<DrmDisplayHostManager> display_manager_;
   std::unique_ptr<DrmOverlayManager> overlay_manager_;
 
-  // Bridges the DRM, GPU and main threads in mus.
-  std::unique_ptr<MusThreadProxy> mus_thread_proxy_;
-
 #if BUILDFLAG(USE_XKBCOMMON)
   XkbEvdevCodes xkb_evdev_code_converter_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(OzonePlatformGbm);
 };
 
 }  // namespace
 
 OzonePlatform* CreateOzonePlatformGbm() {
   return new OzonePlatformGbm;
 }
 
 }  // namespace ui