Propagate supported scanout formats from driver to SurfaceFactoryOzone.

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

Index: ui/ozone/platform/drm/gpu/drm_gpu_display_manager.cc
diff --git a/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.cc b/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.cc
index 402d3c04ca725e1f95c5b36a24ee92077e8337b6..6a521c13a76a35d8a957eea72dc98fe4bde6c621 100644
--- a/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.cc
+++ b/ui/ozone/platform/drm/gpu/drm_gpu_display_manager.cc
@@ -99,6 +99,17 @@ std::vector<DisplaySnapshot_Params> DrmGpuDisplayManager::GetDisplays() {
   return params_list;
 }
 
+void DrmGpuDisplayManager::GetScanoutFormats(
+    gfx::AcceleratedWidget widget,
+    std::vector<gfx::BufferFormat>* scanout_formats) {
+  const std::vector<uint32_t>& fourcc_formats =
+      drm_device_manager_->GetDrmDevice(widget)
+          ->plane_manager()
+          ->GetSupportedFormats();
+  for (auto& fourcc : fourcc_formats)
+    scanout_formats->push_back(GetBufferFormatFromFourCCFormat(fourcc));
+}
+
 bool DrmGpuDisplayManager::TakeDisplayControl() {
   const DrmDeviceVector& devices = drm_device_manager_->GetDrmDevices();
   bool status = true;