Propagate supported scanout formats from driver to SurfaceFactoryOzone.

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

Index: ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h
diff --git a/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h b/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h
index 681a7cdec489163deaa3e978de022482aa48fe04..50e75245a5bda0d0ec6c2408dd101736076f3f91 100644
--- a/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h
+++ b/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.h
@@ -29,6 +29,10 @@ class DrmGpuDisplayManager {
   // displays is refreshed.
   std::vector<DisplaySnapshot_Params> GetDisplays();
 
+  // Returns all formats which can be scanned out by this PlaneManager.
+  void GetScanoutFormats(gfx::AcceleratedWidget widget,
+                         std::vector<gfx::BufferFormat>* scanout_formats);
+
   // Takes/releases the control of the DRM devices.
   bool TakeDisplayControl();
   void RelinquishDisplayControl();