[esnext] prototype runtime implementation for async functions

src/builtins.h

 // Copyright 2011 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.
 
 #ifndef V8_BUILTINS_H_
 #define V8_BUILTINS_H_
 
 #include "src/base/flags.h"
 #include "src/handles.h"
 
@@ skipping 96 matching lines @@
   V(DatePrototypeToTimeString, kNone)                          \
   V(DatePrototypeValueOf, kNone)                               \
   V(DatePrototypeGetYear, kNone)                               \
   V(DatePrototypeSetYear, kNone)                               \
                                                                \
   V(FunctionConstructor, kTargetAndNewTarget)                  \
   V(FunctionPrototypeBind, kNone)                              \
   V(FunctionPrototypeToString, kNone)                          \
                                                                \
   V(GeneratorFunctionConstructor, kTargetAndNewTarget)         \
+  V(AsyncFunctionConstructor, kTargetAndNewTarget)             \
                                                                \
   V(GlobalEval, kTarget)                                       \
                                                                \
   V(MathAcos, kNone)                                           \
   V(MathAsin, kNone)                                           \
   V(MathAtan, kNone)                                           \
   V(MathFround, kNone)                                         \
   V(MathImul, kNone)                                           \
                                                                \
   V(ObjectAssign, kNone)                                       \
@@ skipping 564 matching lines @@
   friend class BuiltinFunctionTable;
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_H_