viz: Fix message pump type for test GPU main on Fuchsia

This is needed as we create platform surfaces on gpu main and therefore
must be able to respond to messages from the winsys on that thread.

Bug: 1047032

Change-Id: Ice667cb451ae17a9e10fbc157f0b88aa0bf14c65
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2047494
Commit-Queue: Michael Spang <spang@chromium.org>
Reviewed-by: Robert Kroeger <rjkroege@chromium.org>
Cr-Commit-Position: refs/heads/master@{#740097}

components/viz/test/DEPS

@@ -33,6 +33,7 @@ include_rules = [
   "+third_party/skia/include",
   "+ui/gl",
   "+ui/latency",
+  "+ui/ozone/public",
 ]
 
 specific_include_rules = {

components/viz/test/test_gpu_service_holder.cc

@@ -35,6 +35,10 @@
 #include "gpu/vulkan/vulkan_implementation.h"
 #endif
 
+#if defined(USE_OZONE)
+#include "ui/ozone/public/ozone_platform.h"
+#endif
+
 namespace viz {
 
 namespace {
@@ -142,7 +146,14 @@ void TestGpuServiceHolder::DoNotResetOnTestExit() {
 TestGpuServiceHolder::TestGpuServiceHolder(
     const gpu::GpuPreferences& gpu_preferences)
     : gpu_thread_("GPUMainThread"), io_thread_("GPUIOThread") {
-  CHECK(gpu_thread_.Start());
+  base::Thread::Options gpu_main_options;
+#if defined(USE_OZONE)
+  gpu_main_options.message_pump_type = ui::OzonePlatform::GetInstance()
+                                           ->GetPlatformProperties()
+                                           .message_pump_type_for_gpu;
+#endif
+
+  CHECK(gpu_thread_.StartWithOptions(gpu_main_options));
   CHECK(io_thread_.Start());
 
   base::WaitableEvent completion;