[inspector] introduced stepIntoAsync for chained callbacks

src/debug/debug-interface.h

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_DEBUG_DEBUG_INTERFACE_H_
 #define V8_DEBUG_DEBUG_INTERFACE_H_
 
 #include <functional>
 
 #include "include/v8-debug.h"
@@ skipping 73 matching lines @@
 void ChangeBreakOnException(Isolate* isolate, ExceptionBreakState state);
 
 enum StepAction {
   StepOut = 0,   // Step out of the current function.
   StepNext = 1,  // Step to the next statement in the current function.
   StepIn = 2     // Step into new functions invoked or the next statement
                  // in the current function.
 };
 
 void PrepareStep(Isolate* isolate, StepAction action);
+void ClearStepping(Isolate* isolate);
 
 bool HasNonBlackboxedFrameOnStack(Isolate* isolate);
 
 /**
  * Out-of-memory callback function.
  * The function is invoked when the heap size is close to the hard limit.
  *
  * \param data the parameter provided during callback installation.
  */
 typedef void (*OutOfMemoryCallback)(void* data);
@@ skipping 41 matching lines @@
 };
 
 void GetLoadedScripts(Isolate* isolate, PersistentValueVector<Script>& scripts);
 
 MaybeLocal<UnboundScript> CompileInspectorScript(Isolate* isolate,
                                                  Local<String> source);
 
 class DebugDelegate {
  public:
   virtual ~DebugDelegate() {}
-  virtual void PromiseEventOccurred(debug::PromiseDebugActionType type, int id,
-                                    int parent_id) {}
+  virtual void PromiseEventOccurred(debug::PromiseDebugActionType type,
+                                    int id) {}
+  virtual void PromiseCreatedEvent(int id, int parent_id, bool is_breakable) {}
   virtual void ScriptCompiled(v8::Local<Script> script,
                               bool has_compile_error) {}
   virtual void BreakProgramRequested(v8::Local<v8::Context> paused_context,
                                      v8::Local<v8::Object> exec_state,
                                      v8::Local<v8::Value> break_points_hit) {}
   virtual void ExceptionThrown(v8::Local<v8::Context> paused_context,
                                v8::Local<v8::Object> exec_state,
                                v8::Local<v8::Value> exception,
                                bool is_promise_rejection, bool is_uncaught) {}
   virtual bool IsFunctionBlackboxed(v8::Local<debug::Script> script,
                                     const debug::Location& start,
                                     const debug::Location& end) {
     return false;
   }
 };
 
 void SetDebugDelegate(Isolate* isolate, DebugDelegate* listener);
 
 void ResetBlackboxedStateCache(Isolate* isolate,
                                v8::Local<debug::Script> script);
 
 }  // namespace debug
 }  // namespace v8
 
 #endif  // V8_DEBUG_DEBUG_INTERFACE_H_