[promises] Remove runtime call from fastpath in PromiseReject

src/js/prologue.js

Index: src/js/prologue.js
diff --git a/src/js/prologue.js b/src/js/prologue.js
index e564eb5cf803f7d1662a4bab272f62471ff8f20b..b673e4dee8d5678a2ef797ff69087f14ab456125 100644
--- a/src/js/prologue.js
+++ b/src/js/prologue.js
@@ -266,7 +266,7 @@ utils.PostDebug = PostDebug;
 
 // -----------------------------------------------------------------------
 
-%OptimizeObjectForAddingMultipleProperties(extrasUtils, 5);
+%OptimizeObjectForAddingMultipleProperties(extrasUtils, 7);
 
 extrasUtils.logStackTrace = function logStackTrace() {
   %DebugTrace();
@@ -307,6 +307,14 @@ extrasUtils.uncurryThis = function uncurryThis(func) {
   };
 };
 
+extrasUtils.rejectPromise = function DoRejectPromise(promise, reason) {

[adamk, 2017/01/13 21:43:37]

s/DoRejectPromise/rejectPromise/

[gsathya, 2017/01/13 22:34:46]

Done.

+  %promise_internal_reject(promise, reason, true);

[adamk, 2017/01/13 21:43:37]

and a comment for true here too

[gsathya, 2017/01/13 22:34:46]

Done.

+}
+
+extrasUtils.markPromiseAsHandled = function markPromiseAsHandled(promise) {
+  %PromiseMarkAsHandled(promise);
+};
+
 %ToFastProperties(extrasUtils);
 
 })