[NotForReview] Enable YUV video overlay on Skylake ChromeOS.

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

Index: ui/ozone/platform/drm/gpu/drm_overlay_validator.cc
diff --git a/ui/ozone/platform/drm/gpu/drm_overlay_validator.cc b/ui/ozone/platform/drm/gpu/drm_overlay_validator.cc
index 182067686831cfe8b6003bdfdccda9398089d37c..9d8a7fa2152f1c33c89d73609f2e03012b346323 100644
--- a/ui/ozone/platform/drm/gpu/drm_overlay_validator.cc
+++ b/ui/ozone/platform/drm/gpu/drm_overlay_validator.cc
@@ -23,6 +23,7 @@ bool NeedsAlphaComposition(uint32_t format) {
   switch (format) {
     case DRM_FORMAT_XRGB8888:
     case DRM_FORMAT_UYVY:
+    case DRM_FORMAT_YUYV:
       return false;
     default:
       return true;
@@ -87,7 +88,9 @@ uint32_t FindOptimalBufferFormat(uint32_t original_format,
     return DRM_FORMAT_XRGB8888;
 
   // YUV is preferable format if supported.
-  if (controller->IsFormatSupported(DRM_FORMAT_UYVY, z_order)) {
+  if (controller->IsFormatSupported(DRM_FORMAT_YUYV, z_order)) {
+    return DRM_FORMAT_YUYV;
+  } else if (controller->IsFormatSupported(DRM_FORMAT_UYVY, z_order)) {
     return DRM_FORMAT_UYVY;
   } else if (controller->IsFormatSupported(DRM_FORMAT_XRGB8888, z_order)) {
     return DRM_FORMAT_XRGB8888;