[Ozone-Dri] Gracefully handle DRM devices with no resources

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 "base/thread_task_runner_handle.h"
 #include "ui/base/cursor/ozone/bitmap_cursor_factory_ozone.h"
 #include "ui/events/ozone/device/device_manager.h"
@@ skipping 73 matching lines @@
                       window_manager_.get(), display_manager_.get()));
     platform_window->Initialize();
     return platform_window.Pass();
   }
   scoped_ptr<NativeDisplayDelegate> CreateNativeDisplayDelegate() override {
     return make_scoped_ptr(new NativeDisplayDelegateProxy(
         gpu_platform_support_host_.get(), device_manager_.get(),
         display_manager_.get()));
   }
   void InitializeUI() override {
-    dri_->Initialize();
+    if (!dri_->Initialize())
+      LOG(FATAL) << "Failed to initialize primary DRM device";
+
     // This makes sure that simple targets that do not handle display
     // configuration can still use the primary display.
     ForceInitializationOfPrimaryDisplay(dri_, screen_manager_.get());
     drm_device_manager_.reset(new DrmDeviceManager(dri_));
     display_manager_.reset(new DisplayManager());
     surface_factory_ozone_.reset(
         new DriSurfaceFactory(&window_delegate_manager_));
     scoped_ptr<NativeDisplayDelegateDri> ndd(new NativeDisplayDelegateDri(
         screen_manager_.get(), dri_,
         scoped_ptr<DrmDeviceGenerator>(new DrmDeviceGenerator())));
@@ skipping 53 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(OzonePlatformDri);
 };
 
 }  // namespace
 
 OzonePlatform* CreateOzonePlatformDri() {
   return new OzonePlatformDri;
 }
 
 }  // namespace ui