Disallow 'await' in object literal shorthand position

src/parsing/preparser.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_PARSING_PREPARSER_H
 #define V8_PARSING_PREPARSER_H
 
 #include "src/ast/scopes.h"
 #include "src/bailout-reason.h"
 #include "src/base/hashmap.h"
@@ skipping 611 matching lines @@
 
   // Helper functions for recursive descent.
   bool IsEval(PreParserIdentifier identifier) const {
     return identifier.IsEval();
   }
 
   bool IsArguments(PreParserIdentifier identifier) const {
     return identifier.IsArguments();
   }
 
-  bool IsAwait(PreParserIdentifier identifier) const {
-    return identifier.IsAwait();
-  }
-
   bool IsEvalOrArguments(PreParserIdentifier identifier) const {
     return identifier.IsEvalOrArguments();
   }
 
   bool IsUndefined(PreParserIdentifier identifier) const {
     return identifier.IsUndefined();
   }
 
   bool IsPrototype(PreParserIdentifier identifier) const {
     return identifier.IsPrototype();
@@ skipping 605 matching lines @@
     pre_parser_->function_state_->NextMaterializedLiteralIndex();
     pre_parser_->function_state_->NextMaterializedLiteralIndex();
   }
   return EmptyExpression();
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PREPARSER_H