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 922ca4a95ed81793f7c6b432c13549c611d3d8bb..a9decb82b740017e0341eecf0730dc5e39a9fa52 100644
--- a/components/scheduler/child/web_task_runner_impl.cc
+++ b/components/scheduler/child/web_task_runner_impl.cc
@@ -43,6 +43,10 @@ void WebTaskRunnerImpl::postDelayedTask(
       base::TimeDelta::FromMillisecondsD(delayMs));
 }
 
+bool WebTaskRunnerImpl::runsTasksOnCurrentThread() {
+  return task_queue_->RunsTasksOnCurrentThread();
+}
+
 double WebTaskRunnerImpl::virtualTimeSeconds() const {
   return (Now() - base::TimeTicks::UnixEpoch()).InSecondsF();
 }