Merge three PromiseEvent's into one.

src/promise.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.
 
 "use strict";
 
 // This file relies on the fact that the following declaration has been made
 // in runtime.js:
 // var $Object = global.Object
 // var $WeakMap = global.WeakMap
@@ skipping 21 matching lines @@
 var lastMicrotaskId = 0;
 
 (function() {
 
   var $Promise = function Promise(resolver) {
     if (resolver === promiseRaw) return;
     if (!%_IsConstructCall()) throw MakeTypeError('not_a_promise', [this]);
     if (!IS_SPEC_FUNCTION(resolver))
       throw MakeTypeError('resolver_not_a_function', [resolver]);
     var promise = PromiseInit(this);
-    if (DEBUG_IS_ACTIVE) {
-      %DebugPromiseEvent({ type : "new",
-                           promise: this,
-                           resolver: resolver });
-    }
     try {
       %DebugPromiseHandlePrologue(function() { return promise });
       resolver(function(x) { PromiseResolve(promise, x) },
                function(r) { PromiseReject(promise, r) });
     } catch (e) {
       PromiseReject(promise, e);
     } finally {
       %DebugPromiseHandleEpilogue();
     }
   }
 
   // Core functionality.
 
   function PromiseSet(promise, status, value, onResolve, onReject) {
     SET_PRIVATE(promise, promiseStatus, status);
     SET_PRIVATE(promise, promiseValue, value);
     SET_PRIVATE(promise, promiseOnResolve, onResolve);
     SET_PRIVATE(promise, promiseOnReject, onReject);
-    if (DEBUG_IS_ACTIVE && status !== 0) {
-      %DebugPromiseEvent({ type: "update",
+    if (DEBUG_IS_ACTIVE) {
+      var type = status === 0 ? "new" : "update";

[aandrey, 2014/08/01 07:46:18]

remove this and the "type". if you really need it, you can do the logic in
PromiseEvent.prototype.type:

if (!this._status)
  return "new";
else if (this._promiseParent)
  return "chain";
else
  return "update";

[Alexandra Mikhaylova, 2014/08/01 12:23:06]

Removed this as we can tell the type of event using status and parent on
backend.

+      %DebugPromiseEvent({ type: type,
                            promise: promise,
                            status: status,
                            value: value });
     }
     return promise;
   }
 
   function PromiseInit(promise) {
     return PromiseSet(
         promise, 0, UNDEFINED, new InternalArray, new InternalArray)
@@ skipping 268 matching lines @@
     "race", PromiseOne,
     "resolve", PromiseCast
   ]);
   InstallFunctions($Promise.prototype, DONT_ENUM, [
     "chain", PromiseChain,
     "then", PromiseThen,
     "catch", PromiseCatch
   ]);
 
 })();