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 170ec76a14e01998fe74d7834e45977c0dc29091..4c2ffa99772ea60b52b4832943e8caae2bc89288 100644
--- a/test/cctest/test-parsing.cc
+++ b/test/cctest/test-parsing.cc
@@ -1072,6 +1072,7 @@ enum ParserFlag {
   kAllowHarmonyScoping,
   kAllowModules,
   kAllowGenerators,
+  kAllowForOf,
   kParserFlagCount
 };
 
@@ -1088,7 +1089,8 @@ 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) {
   uintptr_t stack_limit = i::Isolate::Current()->stack_guard()->real_climit();