Expedite discovery of primary DRM device.

ui/ozone/public/gpu_platform_support_host.cc

Index: ui/ozone/public/gpu_platform_support_host.cc
diff --git a/ui/ozone/public/gpu_platform_support_host.cc b/ui/ozone/public/gpu_platform_support_host.cc
index e1ab0a41594474645a380efc43bf37b129e4bac6..a2144d3de7beab75aa403b219187793927bca719 100644
--- a/ui/ozone/public/gpu_platform_support_host.cc
+++ b/ui/ozone/public/gpu_platform_support_host.cc
@@ -16,11 +16,13 @@ namespace {
 class StubGpuPlatformSupportHost : public GpuPlatformSupportHost {
  public:
   // GpuPlatformSupportHost:
-  void OnChannelEstablished(
+  void OnGpuProcessLaunched(
       int host_id,
       scoped_refptr<base::SingleThreadTaskRunner> send_runner,
       const base::Callback<void(IPC::Message*)>& send_callback) override {}
 
+  void OnChannelEstablished() override {}
+
   void OnChannelDestroyed(int host_id) override {}
   bool OnMessageReceived(const IPC::Message&) override { return false; }
 };