[cleanup] add Parser accessors for FLAG_harmony_function_sent

test/cctest/test-parsing.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1482 matching lines @@
     i::DeleteArray(arg);
   } else {
     CHECK_EQ(0, arg_count);
     arg_object = isolate->factory()->undefined_value();
   }
 
   data.Dispose();
   return i::MessageTemplate::FormatMessage(isolate, message, arg_object);
 }
 
-
 enum ParserFlag {
   kAllowLazy,
   kAllowNatives,
   kAllowHarmonyDefaultParameters,
   kAllowHarmonySloppy,
   kAllowHarmonySloppyLet,
   kAllowHarmonyDestructuring,
   kAllowHarmonyDestructuringAssignment,
   kAllowHarmonyNewTarget,
   kAllowStrongMode,
-  kNoLegacyConst
+  kNoLegacyConst,
+  kAllowHarmonyFunctionSent
 };
 
-
 enum ParserSyncTestResult {
   kSuccessOrError,
   kSuccess,
   kError
 };
 
 template <typename Traits>
 void SetParserFlags(i::ParserBase<Traits>* parser,
                     i::EnumSet<ParserFlag> flags) {
   parser->set_allow_lazy(flags.Contains(kAllowLazy));
   parser->set_allow_natives(flags.Contains(kAllowNatives));
   parser->set_allow_harmony_default_parameters(
       flags.Contains(kAllowHarmonyDefaultParameters));
   parser->set_allow_harmony_sloppy(flags.Contains(kAllowHarmonySloppy));
   parser->set_allow_harmony_sloppy_let(flags.Contains(kAllowHarmonySloppyLet));
   parser->set_allow_harmony_destructuring_bind(
       flags.Contains(kAllowHarmonyDestructuring));
   parser->set_allow_harmony_destructuring_assignment(
       flags.Contains(kAllowHarmonyDestructuringAssignment));
   parser->set_allow_strong_mode(flags.Contains(kAllowStrongMode));
   parser->set_allow_legacy_const(!flags.Contains(kNoLegacyConst));
+  parser->set_allow_harmony_function_sent(
+      flags.Contains(kAllowHarmonyFunctionSent));
 }
 
 
 void TestParserSyncWithFlags(i::Handle<i::String> source,
                              i::EnumSet<ParserFlag> flags,
                              ParserSyncTestResult result,
                              bool is_module = false) {
   i::Isolate* isolate = CcTest::i_isolate();
   i::Factory* factory = isolate->factory();
 
@@ skipping 6466 matching lines @@
     { "", "" },
     { NULL, NULL }
   };
   const char* error_data[] = {
     "var x = function.sent",
     "function* g() { yield function.s\\u0065nt; }",
     NULL
   };
   // clang-format on
 
-  bool old_flag = i::FLAG_harmony_function_sent;
-  i::FLAG_harmony_function_sent = true;
-  RunParserSyncTest(context_data, error_data, kError);
-  i::FLAG_harmony_function_sent = old_flag;
+  static const ParserFlag always_flags[] = {kAllowHarmonyFunctionSent};
+  RunParserSyncTest(context_data, error_data, kError, always_flags,
+                    arraysize(always_flags));
 }
 
 TEST(NewTargetErrors) {
   // clang-format off
   const char* context_data[][2] = {
     { "'use strict'", "" },
     { "", "" },
     { NULL, NULL }
   };
   const char* error_data[] = {
     "var x = new.target",
     "function f() { return new.t\\u0061rget; }",
     NULL
   };
   // clang-format on
   RunParserSyncTest(context_data, error_data, kError);
 }