Ozone: Dont hardcode format to YUV when using Overlay Composition.

ui/ozone/platform/drm/gpu/drm_window_proxy.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_window_proxy.h"
 
 #include "ui/ozone/platform/drm/gpu/drm_thread.h"
 #include "ui/ozone/platform/drm/gpu/overlay_plane.h"
 #include "ui/ozone/platform/drm/gpu/proxy_helpers.h"
 #include "ui/ozone/platform/drm/gpu/scanout_buffer.h"
@@ skipping 15 matching lines @@
 }
 
 void DrmWindowProxy::GetVSyncParameters(
     const gfx::VSyncProvider::UpdateVSyncCallback& callback) {
   drm_thread_->task_runner()->PostTask(
       FROM_HERE,
       base::Bind(&DrmThread::GetVSyncParameters, base::Unretained(drm_thread_),
                  widget_, CreateSafeCallback(callback)));
 }
 
+void DrmWindowProxy::GetOverlayBufferConfigurations(
+    const OverlayParamCallback& callback) {
+  drm_thread_->task_runner()->PostTask(
+      FROM_HERE, base::Bind(&DrmThread::GetOverlayBufferConfigurations,
+                            base::Unretained(drm_thread_), widget_,
+                            CreateSafeCallback(callback)));
+}
+
 }  // namespace ui