[es7] Implement async functions parsing

src/runtime/runtime.h

 // Copyright 2012 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_RUNTIME_RUNTIME_H_
 #define V8_RUNTIME_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/objects.h"
 #include "src/unicode.h"
@@ skipping 219 matching lines @@
   F(InterpreterTypeOf, 1, 1)              \
   F(InterpreterNewClosure, 2, 1)
 
 
 #define FOR_EACH_INTRINSIC_FUNCTION(F)                      \
   F(FunctionGetName, 1, 1)                                  \
   F(FunctionSetName, 2, 1)                                  \
   F(FunctionNameShouldPrintAsAnonymous, 1, 1)               \
   F(FunctionMarkNameShouldPrintAsAnonymous, 1, 1)           \
   F(FunctionIsArrow, 1, 1)                                  \
+  F(FunctionIsAsync, 1, 1)                                  \
   F(FunctionIsConciseMethod, 1, 1)                          \
   F(FunctionRemovePrototype, 1, 1)                          \
   F(FunctionGetScript, 1, 1)                                \
   F(FunctionGetSourceCode, 1, 1)                            \
   F(FunctionGetScriptSourcePosition, 1, 1)                  \
   F(FunctionGetPositionForOffset, 2, 1)                     \
   F(FunctionSetInstanceClassName, 2, 1)                     \
   F(FunctionSetLength, 2, 1)                                \
   F(FunctionSetPrototype, 2, 1)                             \
   F(FunctionIsAPIFunction, 1, 1)                            \
@@ skipping 1007 matching lines @@
 
 class DeclareGlobalsEvalFlag : public BitField<bool, 0, 1> {};
 class DeclareGlobalsNativeFlag : public BitField<bool, 1, 1> {};
 STATIC_ASSERT(LANGUAGE_END == 3);
 class DeclareGlobalsLanguageMode : public BitField<LanguageMode, 2, 2> {};
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_