Fix an occasional crash firing reflectionchange events on XRLightProbe

Trace function was calling the wrong superclass.

Bug: 1166921
Change-Id: I477b68c7ba6b39deddd4d32f2f4f092d6c696f60
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2631285
Commit-Queue: Brandon Jones <bajones@chromium.org>
Reviewed-by: Alexander Cooper <alcooper@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843871}

third_party/blink/renderer/modules/xr/xr_light_probe.cc

@@ -97,7 +97,7 @@ void XRLightProbe::Trace(Visitor* visitor) const {
   visitor->Trace(session_);
   visitor->Trace(probe_space_);
   visitor->Trace(light_estimate_);
-  ScriptWrappable::Trace(visitor);
+  EventTargetWithInlineData::Trace(visitor);
 }
 
 }  // namespace blink

third_party/webxr_test_pages/webxr-samples/proposals/lighting-estimation.html

@@ -153,8 +153,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
       function onReceivedLightProbe(ctx, lightProbe) {
         ctx.xrLightProbe = lightProbe;
-        setInterval(()=>onReflectionChanged(ctx),1000);
-        // ctx.xrLightProbe.addEventListener('reflectionchange', () => onReflectionChanged(ctx));
+        ctx.xrLightProbe.addEventListener('reflectionchange', () => onReflectionChanged(ctx));
       }
 
       function onReflectionChanged(ctx) {