ozone: choose a card useful for display rather than by default

ui/ozone/platform/dri/dri_wrapper.cc

Index: ui/ozone/platform/dri/dri_wrapper.cc
diff --git a/ui/ozone/platform/dri/dri_wrapper.cc b/ui/ozone/platform/dri/dri_wrapper.cc
index a55a3dfffec5afe9daa2f225d9952f5fab72d513..1dcd95b06eadf50fb40c93f7fab43f64e8ba0eb7 100644
--- a/ui/ozone/platform/dri/dri_wrapper.cc
+++ b/ui/ozone/platform/dri/dri_wrapper.cc
@@ -158,7 +158,10 @@ DriWrapper::~DriWrapper() {
 }
 
 void DriWrapper::Initialize() {
-  fd_ = open(device_path_, O_RDWR | O_CLOEXEC);
+  if (device_path_ == NULL)
+    fd_ = OpenFirstDisplayCard();
+  else
+    fd_ = open(device_path_, O_RDWR | O_CLOEXEC);
   if (fd_ < 0)
     PLOG(FATAL) << "open: " << device_path_;
   if (!plane_manager_->Initialize(this))