ozone: Consolidate primary plane format.

ui/ozone/platform/drm/gpu/hardware_display_plane.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/gpu/hardware_display_plane.h"
 
 #include <drm_fourcc.h>
 
 #include "base/logging.h"
 #include "ui/ozone/platform/drm/gpu/drm_device.h"
@@ skipping 48 matching lines @@
                                       bool is_dummy,
                                       bool test_only) {
   supported_formats_ = formats;
 
   if (test_only)
     return true;
 
   if (is_dummy) {
     type_ = kDummy;
     supported_formats_.push_back(DRM_FORMAT_XRGB8888);
+    supported_formats_.push_back(DRM_FORMAT_XBGR8888);
     return true;
   }
 
   ScopedDrmObjectPropertyPtr plane_props(drmModeObjectGetProperties(
       drm->get_fd(), plane_id_, DRM_MODE_OBJECT_PLANE));
   if (!plane_props) {
     PLOG(ERROR) << "Unable to get plane properties.";
     return false;
   }
 
@@ skipping 32 matching lines @@
   return supported_formats_;
 }
 
 bool HardwareDisplayPlane::InitializeProperties(
     DrmDevice* drm,
     const ScopedDrmObjectPropertyPtr& plane_props) {
   return true;
 }
 
 }  // namespace ui