Propagate supported scanout formats from driver to SurfaceFactoryOzone.

ui/ozone/platform/drm/ozone_platform_gbm.cc

Index: ui/ozone/platform/drm/ozone_platform_gbm.cc
diff --git a/ui/ozone/platform/drm/ozone_platform_gbm.cc b/ui/ozone/platform/drm/ozone_platform_gbm.cc
index 3dbe176c0b9dac6e20cefdffc36eb3bb0264a8d2..20abdd862b92c5d2fc04f3c2abce7213d1a0cd99 100644
--- a/ui/ozone/platform/drm/ozone_platform_gbm.cc
+++ b/ui/ozone/platform/drm/ozone_platform_gbm.cc
@@ -99,6 +99,10 @@ class OzonePlatformGbm : public OzonePlatform {
   scoped_ptr<SystemInputInjector> CreateSystemInputInjector() override {
     return event_factory_ozone_->CreateSystemInputInjector();
   }
+  void GetSupportedFormats(std::vector<uint32_t>* support_formats) override {
+    if (drm_thread_.get())
+      return drm_thread_->GetSupportedFormats(support_formats);
+  }
   scoped_ptr<PlatformWindow> CreatePlatformWindow(
       PlatformWindowDelegate* delegate,
       const gfx::Rect& bounds) override {