Add UseCounters for various standards-related code paths

src/js/promise.js

Index: src/js/promise.js
diff --git a/src/js/promise.js b/src/js/promise.js
index ebc5802da12e7147d89908ef3bec7b0a1478d79c..b3d66acefeb6e172547f1c8784637711175d7870 100644
--- a/src/js/promise.js
+++ b/src/js/promise.js
@@ -246,10 +246,12 @@ function NewPromiseCapability(C) {
 }
 
 function PromiseDeferred() {
+  %IncrementUseCounter(kPromiseDefer);
   return NewPromiseCapability(this);
 }
 
 function PromiseResolved(x) {
+  %IncrementUseCounter(kPromiseAccept);
   return %_Call(PromiseCast, this, x);
 }
 
@@ -314,6 +316,7 @@ function PromiseThen(onResolve, onReject) {
 
 // Chain is left around for now as an alias for then
 function PromiseChain(onResolve, onReject) {
+  %IncrementUseCounter(kPromiseChain);
   return %_Call(PromiseThen, this, onResolve, onReject);
 }