[inspector] support setTimeout in Debugger.scheduleStepIntoAsync method

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 9c2ca4aefcf84d9ba2e849410191d8037174798d..2798bb054699f4746dd06c3de063baa7cc0061cf 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -9157,7 +9157,6 @@ void debug::PrepareStep(Isolate* v8_isolate, StepAction action) {
 void debug::ClearStepping(Isolate* v8_isolate) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
   ENTER_V8(isolate);
-  CHECK(isolate->debug()->CheckExecutionState());
   // Clear all current stepping setup.
   isolate->debug()->ClearStepping();
 }