Refactor ozone drm cursor code for mojo

ui/ozone/platform/drm/mus_thread_proxy.cc

 // Copyright 2016 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/mus_thread_proxy.h"
 
 #include "base/bind.h"
 #include "base/single_thread_task_runner.h"
 #include "base/task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "ui/ozone/platform/drm/gpu/drm_thread.h"
 #include "ui/ozone/platform/drm/gpu/proxy_helpers.h"
 #include "ui/ozone/platform/drm/host/drm_display_host_manager.h"
 #include "ui/ozone/platform/drm/host/drm_overlay_manager.h"
 
 namespace ui {
 
 MusThreadProxy::MusThreadProxy()
     : ws_task_runner_(base::ThreadTaskRunnerHandle::Get()),
       drm_thread_(nullptr),
       weak_ptr_factory_(this) {}
 
+void MusThreadProxy::InitializeOnEvdev() {}
+
 MusThreadProxy::~MusThreadProxy() {
   DCHECK(on_window_server_thread_.CalledOnValidThread());
   FOR_EACH_OBSERVER(GpuThreadObserver, gpu_thread_observers_,
                     OnGpuThreadRetired());
 }
 
 // This is configured on the GPU thread.
 void MusThreadProxy::SetDrmThread(DrmThread* thread) {
   base::AutoLock acquire(lock_);
   drm_thread_ = thread;
@@ skipping 297 matching lines @@
   display_manager_->GpuReceivedHDCPState(display_id, success, state);
 }
 
 void MusThreadProxy::GpuSetHDCPStateCallback(int64_t display_id,
                                              bool success) const {
   DCHECK(on_window_server_thread_.CalledOnValidThread());
   display_manager_->GpuUpdatedHDCPState(display_id, success);
 }
 
 }  // namespace ui