[Ozone-Dri] Decouple the IO helper thread from DriWrapper

ui/ozone/platform/dri/ozone_platform_dri.cc

 // Copyright 2013 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/dri/ozone_platform_dri.h"
 
 #include "base/at_exit.h"
 #include "ui/base/cursor/ozone/bitmap_cursor_factory_ozone.h"
 #include "ui/events/ozone/device/device_manager.h"
 #include "ui/events/ozone/evdev/cursor_delegate_evdev.h"
@@ skipping 29 matching lines @@
 
 const char kDefaultGraphicsCardPath[] = "/dev/dri/card0";
 
 // OzonePlatform for Linux DRI (Direct Rendering Infrastructure)
 //
 // This platform is Linux without any display server (no X, wayland, or
 // anything). This means chrome alone owns the display and input devices.
 class OzonePlatformDri : public OzonePlatform {
  public:
   OzonePlatformDri()
-      : dri_(new DriWrapper(kDefaultGraphicsCardPath, true)),
+      : dri_(new DriWrapper(kDefaultGraphicsCardPath, nullptr)),
         buffer_generator_(new DriBufferGenerator()),
         screen_manager_(new ScreenManager(dri_.get(), buffer_generator_.get())),
         device_manager_(CreateDeviceManager()) {}
   ~OzonePlatformDri() override {}
 
   // OzonePlatform:
   ui::SurfaceFactoryOzone* GetSurfaceFactoryOzone() override {
     return surface_factory_ozone_.get();
   }
   CursorFactoryOzone* GetCursorFactoryOzone() override {
@@ skipping 29 matching lines @@
   void InitializeUI() override {
     dri_->Initialize();
     display_manager_.reset(new DisplayManager());
     surface_factory_ozone_.reset(
         new DriSurfaceFactory(dri_.get(), &window_delegate_manager_));
     scoped_ptr<NativeDisplayDelegateDri> ndd(
         new NativeDisplayDelegateDri(dri_.get(), screen_manager_.get()));
     ndd->Initialize();
     gpu_platform_support_.reset(
         new DriGpuPlatformSupport(dri_.get(), &window_delegate_manager_,
-                                  screen_manager_.get(), ndd.Pass()));
+                                  screen_manager_.get(), nullptr, ndd.Pass()));
     gpu_platform_support_host_.reset(new DriGpuPlatformSupportHost());
     window_manager_.reset(new DriWindowManager());
     cursor_factory_ozone_.reset(new BitmapCursorFactoryOzone);
     cursor_.reset(
         new DriCursor(window_manager_.get(), gpu_platform_support_host_.get()));
     cursor_->Init();
 #if defined(USE_XKBCOMMON)
     KeyboardLayoutEngineManager::SetKeyboardLayoutEngine(make_scoped_ptr(
         new XkbKeyboardLayoutEngine(xkb_evdev_code_converter_)));
 #else
@@ skipping 38 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(OzonePlatformDri);
 };
 
 }  // namespace
 
 OzonePlatform* CreateOzonePlatformDri() {
   return new OzonePlatformDri;
 }
 
 }  // namespace ui