[inspector] introduced stepIntoAsync for chained callbacks

src/inspector/v8-debugger.h

Index: src/inspector/v8-debugger.h
diff --git a/src/inspector/v8-debugger.h b/src/inspector/v8-debugger.h
index c45c76f7f922a33f05052f4bfa7f53e1bb0fc83d..4c5f7928d8060a331a7e28bd85239c28755dedec 100644
--- a/src/inspector/v8-debugger.h
+++ b/src/inspector/v8-debugger.h
@@ -48,6 +48,8 @@ class V8Debugger : public v8::debug::DebugDelegate {
   void stepIntoStatement();
   void stepOverStatement();
   void stepOutOfFunction();
+  Response stepIntoScheduledCallback();
+  bool stepIntoScheduledCallbackAvailable();
 
   Response setScriptSource(
       const String16& sourceID, v8::Local<v8::String> newSource, bool dryRun,
@@ -129,9 +131,12 @@ class V8Debugger : public v8::debug::DebugDelegate {
   void asyncTaskCreated(void* task, void* parentTask);
   void registerAsyncTaskIfNeeded(void* task);
 
+  void continueProgramImpl();
+
   // v8::debug::DebugEventListener implementation.
-  void PromiseEventOccurred(v8::debug::PromiseDebugActionType type, int id,
-                            int parentId) override;
+  void PromiseEventOccurred(v8::Local<v8::Context> context,
+                            v8::debug::PromiseDebugActionType type, int id,
+                            int parentId, bool breakable) override;
   void ScriptCompiled(v8::Local<v8::debug::Script> script,
                       bool has_compile_error) override;
   void BreakProgramRequested(v8::Local<v8::Context> paused_context,
@@ -145,6 +150,11 @@ class V8Debugger : public v8::debug::DebugDelegate {
                             const v8::debug::Location& start,
                             const v8::debug::Location& end) override;
 
+  int currentContextGroupId();
+  void steppingOnPromiseEvent(v8::Local<v8::Context> context,
+                              v8::debug::PromiseDebugActionType type,
+                              void* task, void* parentPtr);
+
   v8::Isolate* m_isolate;
   V8InspectorImpl* m_inspector;
   int m_enableCount;
@@ -171,6 +181,8 @@ class V8Debugger : public v8::debug::DebugDelegate {
   std::vector<std::unique_ptr<V8StackTraceImpl>> m_currentStacks;
   protocol::HashMap<V8DebuggerAgentImpl*, int> m_maxAsyncCallStackDepthMap;
   protocol::HashMap<void*, void*> m_parentTask;
+  protocol::HashSet<void*> m_tasksWithScheduledBreak;
+  void* m_createdPromiseTask = nullptr;
 
   v8::debug::ExceptionBreakState m_pauseOnExceptionsState;