[api] add API for Promise status and result.

src/runtime/runtime-promise.cc

 // Copyright 2016 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.
 #include "src/runtime/runtime-utils.h"
 
 #include "src/debug/debug.h"
 #include "src/elements.h"
 #include "src/promise-utils.h"
 
 namespace v8 {
@@ skipping 91 matching lines @@
   promise->set_result(*result);
   promise->set_deferred(isolate->heap()->undefined_value());
   promise->set_fulfill_reactions(isolate->heap()->undefined_value());
   promise->set_reject_reactions(isolate->heap()->undefined_value());
 }
 
 void PromiseFulfill(Isolate* isolate, Handle<JSPromise> promise,
                     Handle<Smi> status, Handle<Object> value) {
   // Check if there are any callbacks.
   if (!promise->deferred()->IsUndefined(isolate)) {
-    Handle<Object> tasks((status->value() == kPromiseFulfilled)
+    Handle<Object> tasks((status->value() == v8::Promise::kFulfilled)
                              ? promise->fulfill_reactions()
                              : promise->reject_reactions(),
                          isolate);
     Handle<Object> deferred(promise->deferred(), isolate);
     EnqueuePromiseReactionJob(isolate, promise, value, tasks, deferred, status);
   }
 
   PromiseSet(isolate, promise, status->value(), value);
 }
 
 }  // namespace
 
 RUNTIME_FUNCTION(Runtime_PromiseReject) {
   DCHECK(args.length() == 3);
   HandleScope scope(isolate);
   CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0);
   CONVERT_ARG_HANDLE_CHECKED(Object, reason, 1);
   CONVERT_BOOLEAN_ARG_CHECKED(debug_event, 2);
 
   PromiseRejectEvent(isolate, promise, promise, reason, debug_event);
 
-  Handle<Smi> status(Smi::FromInt(kPromiseRejected), isolate);
+  Handle<Smi> status(Smi::FromInt(v8::Promise::kRejected), isolate);
   PromiseFulfill(isolate, promise, status, reason);
   return isolate->heap()->undefined_value();
 }
 
 RUNTIME_FUNCTION(Runtime_PromiseFulfill) {
   DCHECK(args.length() == 3);
   HandleScope scope(isolate);
   CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0);
   CONVERT_ARG_HANDLE_CHECKED(Smi, status, 1);
   CONVERT_ARG_HANDLE_CHECKED(Object, value, 2);
@@ skipping 173 matching lines @@
   HandleScope scope(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSPromise, promise, 0);
   isolate->RunPromiseHook(PromiseHookType::kAfter, promise,
                           isolate->factory()->undefined_value());
   return isolate->heap()->undefined_value();
 }
 
 }  // namespace internal
 }  // namespace v8