Fix the MessageLoop type in case more than one ozone platform is built

services/ui/gpu/gpu_main.cc

Index: services/ui/gpu/gpu_main.cc
diff --git a/services/ui/gpu/gpu_main.cc b/services/ui/gpu/gpu_main.cc
index a87c7cbe39cdfe1054435e7b8eae149a32dd706b..743fc45ac49f71cf2bb0cf79c88bc9ea3643cdde 100644
--- a/services/ui/gpu/gpu_main.cc
+++ b/services/ui/gpu/gpu_main.cc
@@ -14,6 +14,10 @@
 #include "services/ui/common/server_gpu_memory_buffer_manager.h"
 #include "services/ui/gpu/gpu_service.h"
 
+#if defined(USE_OZONE)
+#include "ui/ozone/public/ozone_platform.h"
+#endif
+
 #if defined(OS_MACOSX)
 #include "base/message_loop/message_pump_mac.h"
 #endif
@@ -51,7 +55,13 @@ GpuMain::GpuMain(mojom::GpuMainRequest request)
 #elif defined(USE_X11)
   thread_options.message_pump_factory = base::Bind(&CreateMessagePumpX11);
 #elif defined(USE_OZONE)
-  thread_options.message_loop_type = base::MessageLoop::TYPE_UI;
+  // The MessageLoop type required depends on the Ozone platform selected at
+  // runtime.
+  // TODO(sadrul/tonikitoo): When the mus-ui/gpu processes split up happen,
+  // OzonePlatform::CreateInstance will need to be called before
+  // ::GetMessageLoopTypeForGpu.
+  thread_options.message_loop_type =
+      ui::OzonePlatform::GetInstance()->GetMessageLoopTypeForGpu();
 #elif defined(OS_LINUX)
   thread_options.message_loop_type = base::MessageLoop::TYPE_DEFAULT;
 #elif defined(OS_MACOSX)