Expose RunsTasksOnCurrentThread through WebTaskRunner

components/scheduler/child/web_task_runner_impl.cc

Index: components/scheduler/child/web_task_runner_impl.cc
diff --git a/components/scheduler/child/web_task_runner_impl.cc b/components/scheduler/child/web_task_runner_impl.cc
index d04af7f8ca15b83f492c7f98b6267b9a1e66c44f..269429c2399ed3f5cd62cdda90bdeab21f8ca79d 100644
--- a/components/scheduler/child/web_task_runner_impl.cc
+++ b/components/scheduler/child/web_task_runner_impl.cc
@@ -38,6 +38,10 @@ void WebTaskRunnerImpl::postDelayedTask(
       base::TimeDelta::FromMillisecondsD(delayMs));
 }
 
+bool WebTaskRunnerImpl::runsTasksOnCurrentThread() {
+  return task_queue_->RunsTasksOnCurrentThread();
+}
+
 double WebTaskRunnerImpl::virtualTimeSeconds() const {
   return (Now() - base::TimeTicks::UnixEpoch()).InSecondsF();
 }