Reland Create JSPromise (patchset #16 id:300001 of https://codereview.chromium.org/2536463002/ )"

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 48395ee773ca3c61101223cc580b9ad75df367bc..3b5e1acbb78ea93e45d80e5ab467e980d186b79e 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -858,7 +858,6 @@ bool HeapObject::IsJSArrayBufferView() const {
 
 TYPE_CHECKER(JSRegExp, JS_REGEXP_TYPE)
 
-
 template <> inline bool Is<JSArray>(Object* obj) {
   return obj->IsJSArray();
 }
@@ -2094,7 +2093,7 @@ int JSObject::GetHeaderSize(InstanceType type) {
     case JS_WEAK_SET_TYPE:
       return JSWeakSet::kSize;
     case JS_PROMISE_TYPE:
-      return JSObject::kHeaderSize;
+      return JSPromise::kSize;
     case JS_REGEXP_TYPE:
       return JSRegExp::kSize;
     case JS_CONTEXT_EXTENSION_OBJECT_TYPE:
@@ -3323,6 +3322,7 @@ CAST_ACCESSOR(JSObject)
 CAST_ACCESSOR(JSProxy)
 CAST_ACCESSOR(JSReceiver)
 CAST_ACCESSOR(JSRegExp)
+CAST_ACCESSOR(JSPromise)
 CAST_ACCESSOR(JSSet)
 CAST_ACCESSOR(JSSetIterator)
 CAST_ACCESSOR(JSStringIterator)
@@ -7095,6 +7095,11 @@ void JSTypedArray::set_length(Object* value, WriteBarrierMode mode) {
 ACCESSORS(JSTypedArray, raw_length, Object, kLengthOffset)
 #endif
 
+SMI_ACCESSORS(JSPromise, status, kStatusOffset)
+ACCESSORS(JSPromise, result, Object, kResultOffset)
+ACCESSORS(JSPromise, deferred, Object, kDeferredOffset)
+ACCESSORS(JSPromise, fulfill_reactions, Object, kFulfillReactionsOffset)
+ACCESSORS(JSPromise, reject_reactions, Object, kRejectReactionsOffset)
 
 ACCESSORS(JSRegExp, data, Object, kDataOffset)
 ACCESSORS(JSRegExp, flags, Object, kFlagsOffset)