Split off a separate --harmony_sloppy_let flag

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 1413 matching lines @@
 }
 
 
 enum ParserFlag {
   kAllowLazy,
   kAllowNatives,
   kAllowHarmonyModules,
   kAllowHarmonyArrowFunctions,
   kAllowHarmonyRestParameters,
   kAllowHarmonySloppy,
+  kAllowHarmonySloppyLet,
   kAllowHarmonyUnicode,
   kAllowHarmonyComputedPropertyNames,
   kAllowHarmonySpreadCalls,
   kAllowHarmonyDestructuring,
   kAllowHarmonySpreadArrays,
   kAllowHarmonyNewTarget,
   kAllowStrongMode,
   kNoLegacyConst
 };
 
@@ skipping 10 matching lines @@
   parser->set_allow_lazy(flags.Contains(kAllowLazy));
   parser->set_allow_natives(flags.Contains(kAllowNatives));
   parser->set_allow_harmony_modules(flags.Contains(kAllowHarmonyModules));
   parser->set_allow_harmony_arrow_functions(
       flags.Contains(kAllowHarmonyArrowFunctions));
   parser->set_allow_harmony_rest_params(
       flags.Contains(kAllowHarmonyRestParameters));
   parser->set_allow_harmony_spreadcalls(
       flags.Contains(kAllowHarmonySpreadCalls));
   parser->set_allow_harmony_sloppy(flags.Contains(kAllowHarmonySloppy));
+  parser->set_allow_harmony_sloppy_let(flags.Contains(kAllowHarmonySloppyLet));
   parser->set_allow_harmony_unicode(flags.Contains(kAllowHarmonyUnicode));
   parser->set_allow_harmony_computed_property_names(
       flags.Contains(kAllowHarmonyComputedPropertyNames));
   parser->set_allow_harmony_destructuring(
       flags.Contains(kAllowHarmonyDestructuring));
   parser->set_allow_harmony_spread_arrays(
       flags.Contains(kAllowHarmonySpreadArrays));
   parser->set_allow_harmony_new_target(flags.Contains(kAllowHarmonyNewTarget));
   parser->set_allow_strong_mode(flags.Contains(kAllowStrongMode));
   parser->set_allow_legacy_const(!flags.Contains(kNoLegacyConst));
@@ skipping 5360 matching lines @@
   const char* data[] = {
     "let x",
     "let x = 1",
     "for (let x = 1; x < 1; x++) {}",
     "for (let x in {}) {}",
     "for (let x of []) {}",
     NULL
   };
   // clang-format on
 
-  static const ParserFlag always_flags[] = {kAllowHarmonySloppy};
+  static const ParserFlag always_flags[] = {kAllowHarmonySloppy,
+                                            kAllowHarmonySloppyLet};
   RunParserSyncTest(context_data, data, kSuccess, NULL, 0, always_flags,
                     arraysize(always_flags));
 }