Mark SpatialLayerStructTraitTest.RoundTrip as failing

This test is failing on msan. I can reproduce locally with the following
gn args:
is_component_build = false
is_debug = false
is_msan = true
msan_track_origins = 2
use_goma = true

TBR=sandersd@chromium.org,dominickn@chromium.org,hiroh@chromium.org
Bug: 1067758

Change-Id: I83549612a97e35c06081da320398213a7bc1914d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2136119Reviewed-by: Joey Arhar <jarhar@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Joey Arhar <jarhar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756476}

media/mojo/mojom/video_encode_accelerator_mojom_traits_unittest.cc

@@ -109,7 +109,13 @@ TEST(VideoEncoderInfoStructTraitTest, RoundTrip) {
   EXPECT_EQ(input, output);
 }
 
-TEST(SpatialLayerStructTraitTest, RoundTrip) {
+// This test is failing on msan: crbug.com/1067758
+#if defined(MEMORY_SANITIZER)
+#define MAYBE_RoundTrip DISABLED_RoundTrip
+#else
+#define MAYBE_RoundTrip RoundTrip
+#endif
+TEST(SpatialLayerStructTraitTest, MAYBE_RoundTrip) {
   ::media::VideoEncodeAccelerator::Config::SpatialLayer input_spatial_layer;
   input_spatial_layer.width = 320u;
   input_spatial_layer.width = 180u;