[NotForReview] Enable YUV video overlay on Skylake ChromeOS.

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

 // Copyright 2015 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/drm_overlay_validator.h"
 
 #include <drm_fourcc.h>
 
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/ozone/platform/drm/common/drm_util.h"
 #include "ui/ozone/platform/drm/gpu/drm_device.h"
 #include "ui/ozone/platform/drm/gpu/drm_window.h"
 #include "ui/ozone/platform/drm/gpu/hardware_display_controller.h"
 #include "ui/ozone/platform/drm/gpu/scanout_buffer.h"
 
 namespace ui {
 
 namespace {
 
 const size_t kMaxCacheSize = 200;
 
 bool NeedsAlphaComposition(uint32_t format) {
   switch (format) {
     case DRM_FORMAT_XRGB8888:
     case DRM_FORMAT_UYVY:
+    case DRM_FORMAT_YUYV:
       return false;
     default:
       return true;
   }
 }
 
 scoped_refptr<ScanoutBuffer> GetBufferForPageFlipTest(
     const scoped_refptr<DrmDevice>& drm_device,
     const gfx::Size& size,
     uint32_t format,
@@ skipping 44 matching lines @@
     // what was used during Modeset on non atomic kernels. There is no
     // definitive way to query this.
     force_primary_format = true;
 #endif
   }
 
   if (force_primary_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;
   }
 
   return original_format;
 }
 
 }  // namespace
 
@@ skipping 172 matching lines @@
 
     // Make sure we dont hold reference to buffer when caching this plane list.
     plane.buffer = nullptr;
   }
 
   DCHECK(hints_plane_list.size() == overlay_hints.size());
   overlay_hints_cache_.Put(hints_plane_list, overlay_hints);
 }
 
 }  // namespace ui