[inspector] introduced Debugger.scheduleStepIntoAsync

src/inspector/v8-debugger-agent-impl.cc

Index: src/inspector/v8-debugger-agent-impl.cc
diff --git a/src/inspector/v8-debugger-agent-impl.cc b/src/inspector/v8-debugger-agent-impl.cc
index 8b7521d974b0da1de2a6a62cf4054014f4471e04..bf7ddb46a57b6720a1da492513d808a9885c43d6 100644
--- a/src/inspector/v8-debugger-agent-impl.cc
+++ b/src/inspector/v8-debugger-agent-impl.cc
@@ -736,6 +736,28 @@ Response V8DebuggerAgentImpl::stepOut() {
   return Response::OK();
 }
 
+void V8DebuggerAgentImpl::scheduleStepIntoAsync(
+    std::unique_ptr<ScheduleStepIntoAsyncCallback> callback) {
+  if (!isPaused()) {
+    callback->sendFailure(Response::Error(kDebuggerNotPaused));
+    return;
+  }
+  if (m_stepIntoAsyncCallback) {
+    m_stepIntoAsyncCallback->sendFailure(Response::Error(
+        "Current scheduled step into async was overriden with new one."));
+  }
+  m_stepIntoAsyncCallback = std::move(callback);
+}
+
+bool V8DebuggerAgentImpl::shouldBreakInScheduledAsyncTask() {
+  if (!m_stepIntoAsyncCallback) return false;
+  m_stepIntoAsyncCallback->sendSuccess();
+  m_stepIntoAsyncCallback.reset();
+  m_scheduledDebuggerStep = NoStep;
+  v8::debug::ClearStepping(m_isolate);
+  return true;
+}
+
 Response V8DebuggerAgentImpl::setPauseOnExceptions(
     const String16& stringPauseState) {
   if (!enabled()) return Response::Error(kDebuggerNotEnabled);
@@ -1226,6 +1248,12 @@ void V8DebuggerAgentImpl::didPause(int contextId,
     breakAuxData->setArray("reasons", std::move(reasons));
   }
 
+  if (m_stepIntoAsyncCallback) {
+    m_stepIntoAsyncCallback->sendFailure(
+        Response::Error("No async tasks were scheduled before pause."));
+    m_stepIntoAsyncCallback.reset();
+  }
+
   std::unique_ptr<Array<CallFrame>> protocolCallFrames;
   Response response = currentCallFrames(&protocolCallFrames);
   if (!response.isSuccess()) protocolCallFrames = Array<CallFrame>::create();