[promises] Remove runtime call from fastpath in PromiseReject

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 9d1789143225916bcf774cce7f44fe2b3e34acaa..9962922abe87f86e301d26fbd09140422d9e2e19 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1971,6 +1971,14 @@ void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
       promise_handle->set_is_exception_caught(true);
     }
 
+    {  // Internal: InternalPromiseReject
+      Handle<JSFunction> function =
+          SimpleCreateFunction(isolate, factory->empty_string(),
+                               Builtins::kInternalPromiseReject, 3, true);

[adamk, 2017/01/13 20:31:33]

Why does this need an arguments adapter?

[gsathya, 2017/01/13 21:12:40]

I was initially installing this directly on the extraUtils object, but this can
be changed now.

+      InstallWithIntrinsicDefaultProto(isolate, function,
+                                       Context::PROMISE_INTERNAL_REJECT_INDEX);
+    }
+
     {
       Handle<Code> code =
           handle(isolate->builtins()->builtin(Builtins::kPromiseResolveClosure),