Add initial parser support for harmony iteration

test/cctest/test-parsing.cc

Index: test/cctest/test-parsing.cc
diff --git a/test/cctest/test-parsing.cc b/test/cctest/test-parsing.cc
index 6367c74c0a8373a0caa6ed2c76f9534332099c36..62a5bcc397273214c881ac59ab57df6a31b170e8 100644
--- a/test/cctest/test-parsing.cc
+++ b/test/cctest/test-parsing.cc
@@ -1078,6 +1078,7 @@ enum ParserFlag {
   kAllowHarmonyScoping,
   kAllowModules,
   kAllowGenerators,
+  kAllowForOf,
   kParserFlagCount
 };
 
@@ -1094,7 +1095,8 @@ static bool checkParserFlag(unsigned flags, ParserFlag flag) {
   parser.set_allow_harmony_scoping(checkParserFlag(flags, \
                                                    kAllowHarmonyScoping)); \
   parser.set_allow_modules(checkParserFlag(flags, kAllowModules)); \
-  parser.set_allow_generators(checkParserFlag(flags, kAllowGenerators));
+  parser.set_allow_generators(checkParserFlag(flags, kAllowGenerators)); \
+  parser.set_allow_for_of(checkParserFlag(flags, kAllowForOf));
 
 void TestParserSyncWithFlags(i::Handle<i::String> source, unsigned flags) {
   i::Isolate* isolate = i::Isolate::Current();