Bug 1534392 - Part 1: Update step numbers in comments to match curren…

…t draft spec. r=anba

The new steps are official since <tc39/ecma262#1250>
landed. (Some of these step numbers change again in the next commit.)

Differential Revision: https://phabricator.services.mozilla.com/D23029

UltraBlame original commit: 47e570e513851c5e4a7b930af82ad9de21e0bb22

js/src/builtin/Promise.cpp

@@ -14721,17 +14721,17 @@ isInt32
 )
 )
 ;
-Rooted
-<
-PromiseObject
-*
->
+RootedObject
 promise
 (
 cx
-CreatePromiseObjectWithoutResolutionFunctions
+PromiseObject
+:
+:
+unforgeableResolve
 (
 cx
+value
 )
 )
 ;
@@ -14745,16 +14745,29 @@ return
 false
 ;
 }
-if
+Rooted
+<
+PromiseObject
+*
+>
+unwrappedPromise
 (
-!
-ResolvePromiseInternal
+cx
+UnwrapAndDowncastObject
+<
+PromiseObject
+>
 (
 cx
 promise
-value
 )
 )
+;
+if
+(
+!
+unwrappedPromise
+)
 {
 return
 false
@@ -14820,7 +14833,7 @@ return
 PerformPromiseThenWithReaction
 (
 cx
-promise
+unwrappedPromise
 reaction
 )
 ;