DevTools: move recurring flag into AsyncTask, control cancelation from embedder only.

third_party/WebKit/Source/core/dom/Document.cpp

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index 7b43059e98e5dfa347e8da67cdddecde9694b845..e184fe385333a69833f7ddf0a12bd685793567e7 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -4476,7 +4476,7 @@ void Document::sendSensitiveInputVisibilityInternal() {
 void Document::runExecutionContextTask(
     std::unique_ptr<ExecutionContextTask> task,
     bool isInstrumented) {
-  probe::AsyncTask asyncTask(this, task.get(), isInstrumented);
+  probe::AsyncTask asyncTask(this, task.get(), nullptr, isInstrumented);
   task->performTask(this);
 }