Preliminary atomic patch

ui/ozone/platform/drm/gpu/hardware_display_plane_manager.h

Index: ui/ozone/platform/drm/gpu/hardware_display_plane_manager.h
diff --git a/ui/ozone/platform/drm/gpu/hardware_display_plane_manager.h b/ui/ozone/platform/drm/gpu/hardware_display_plane_manager.h
index 03a289ed582ec7738e0fd839103c1a03732f24d7..7110cc3a3c6816b455f7ea2c2c2e8a4cdbf1f26b 100644
--- a/ui/ozone/platform/drm/gpu/hardware_display_plane_manager.h
+++ b/ui/ozone/platform/drm/gpu/hardware_display_plane_manager.h
@@ -64,6 +64,10 @@ struct OZONE_EXPORT HardwareDisplayPlaneList {
   // pageflipping.
   std::vector<PageFlipInfo> legacy_page_flips;
 
+#if defined(USE_DRM_ATOMIC)
+  ScopedDrmPropertySetPtr atomic_property_set;
+#endif  // defined(USE_DRM_ATOMIC)
+
   // Set if the last operation on this list was a Commit().
   bool committed;
 };
@@ -101,6 +105,10 @@ class OZONE_EXPORT HardwareDisplayPlaneManager {
                             uint32_t crtc_id,
                             const gfx::Rect& src_rect,
                             CrtcController* crtc) = 0;
+
+  virtual scoped_ptr<HardwareDisplayPlane> CreatePlane(uint32_t plane_id,
+                                                       uint32_t possible_crtcs);
+
   // Finds the plane located at or after |*index| that is not in use and can
   // be used with |crtc_index|.
   HardwareDisplayPlane* FindNextUnusedPlane(size_t* index, uint32_t crtc_index);