Merge V8 5.2.361.47  DO NOT MERGE

https://chromium.googlesource.com/v8/v8/+/5.2.361.47

FPIIM-449

Change-Id: Ibec421b85a9b88cb3a432ada642e469fe7e78346
(cherry picked from commit bcf72ee8e3b26f1d0726869c7ddb3921c68b09a8)
diff --git a/src/ast/ast-value-factory.h b/src/ast/ast-value-factory.h
index 8b3f0ed..041581b 100644
--- a/src/ast/ast-value-factory.h
+++ b/src/ast/ast-value-factory.h
@@ -242,6 +242,8 @@
 #define STRING_CONSTANTS(F)                     \
   F(anonymous_function, "(anonymous function)") \
   F(arguments, "arguments")                     \
+  F(async, "async")                             \
+  F(await, "await")                             \
   F(constructor, "constructor")                 \
   F(default, "default")                         \
   F(done, "done")                               \