[inspector] async stacks for Promise.then calls...

src/debug/debug.js

 // Copyright 2012 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.
 
 (function (global, utils) {
 "use strict";
 
 // ----------------------------------------------------------------------------
 // Imports
 
@@ skipping 1076 matching lines @@
   return o;
 }
 
 
 function PromiseDebugActionNameToString(name) {
   switch (name) {
     case kAsyncFunction: return "async function";
     case kPromiseResolve: return "Promise.resolve";
     case kPromiseReject: return "Promise.reject";
     case kPromiseResolveThenableJob: return "PromiseResolveThenableJob";
-  }
-}
-
-function PromiseDebugActionTypeToString(type) {
-  switch (type) {
-    case kEnqueue: return "enqueue";
-    case kEnqueueRecurring: return "enqueueRecurring";
-    case kCancel: return "cancel";
-    case kWillHandle: return "willHandle";
-    case kDidHandle: return "didHandle";
+    case kDebugPromiseCollected: return "Promise collected";
   }
 }
 
 function MakeAsyncTaskEvent(type, id, name) {
-  return new AsyncTaskEvent(PromiseDebugActionTypeToString(type),
+  return new AsyncTaskEvent(type,
                             id, PromiseDebugActionNameToString(name));
 }
 
 
 function AsyncTaskEvent(type, id, name) {
   this.type_ = type;
   this.id_ = id;
   this.name_ = name;
 }
 
@@ skipping 1288 matching lines @@
 utils.InstallFunctions(utils, DONT_ENUM, [
   "MakeExecutionState", MakeExecutionState,
   "MakeExceptionEvent", MakeExceptionEvent,
   "MakeBreakEvent", MakeBreakEvent,
   "MakeCompileEvent", MakeCompileEvent,
   "MakeAsyncTaskEvent", MakeAsyncTaskEvent,
   "IsBreakPointTriggered", IsBreakPointTriggered,
 ]);
 
 })