Speed up parsing w/ grammar shortcut.

src/parsing/parser.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_PARSER_H_
 #define V8_PARSING_PARSER_H_
 
 #include "src/allocation.h"
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
@@ skipping 345 matching lines @@
   bool IsEvalOrArguments(const AstRawString* identifier) const;
   bool IsUndefined(const AstRawString* identifier) const;
   bool IsAwait(const AstRawString* identifier) const;
   V8_INLINE bool IsFutureStrictReserved(const AstRawString* identifier) const;
 
   // Returns true if the expression is of type "this.foo".
   static bool IsThisProperty(Expression* expression);
 
   static bool IsIdentifier(Expression* expression);
 
+  static bool IsEmptyExpression(Expression* expression);
+
   bool IsPrototype(const AstRawString* identifier) const;
 
   bool IsConstructor(const AstRawString* identifier) const;
 
   static const AstRawString* AsIdentifier(Expression* expression) {
     DCHECK(IsIdentifier(expression));
     return expression->AsVariableProxy()->raw_name();
   }
 
   bool IsDirectEvalCall(Expression* expression) {
@@ skipping 943 matching lines @@
 
 DoExpression* ParserTraits::ParseDoExpression(bool* ok) {
   return parser_->ParseDoExpression(ok);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_H_