ozone: Add atomic initialization path

ui/ozone/platform/drm/gpu/hardware_display_plane_manager.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_manager.h"
 
 #include <drm.h>
 #include <xf86drm.h>
 
 #include <set>
 
 #include "base/logging.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/ozone/platform/drm/gpu/crtc_controller.h"
 #include "ui/ozone/platform/drm/gpu/drm_device.h"
 #include "ui/ozone/platform/drm/gpu/hardware_display_controller.h"
 #include "ui/ozone/platform/drm/gpu/scanout_buffer.h"
 #include "ui/ozone/public/ozone_switches.h"
 
 namespace ui {
 namespace {
 
 const float kFixedPointScaleValue = 65536.0f;
 
 }  // namespace
 
 HardwareDisplayPlaneList::HardwareDisplayPlaneList() : committed(false) {
+#if defined(USE_DRM_ATOMIC)
+  atomic_property_set.reset(drmModePropertySetAlloc());
+#endif  // defined(USE_DRM_ATOMIC)
 }
+
 HardwareDisplayPlaneList::~HardwareDisplayPlaneList() {
   for (auto* plane : plane_list) {
     plane->set_in_use(false);
     plane->set_owning_crtc(0);
   }
   for (auto* plane : old_plane_list) {
     plane->set_in_use(false);
     plane->set_owning_crtc(0);
   }
 }
@@ skipping 184 matching lines @@
     if (plane->owning_crtc() == crtc_id) {
       plane->set_owning_crtc(0);
       plane->set_in_use(false);
     } else {
       plane_list->old_plane_list.push_back(plane);
     }
   }
 }
 
 }  // namespace ui