Revert "Unify paren handling in Parser and PreParser."

src/ast.h

 // 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 333 matching lines @@
 
   // True iff the expression is a string literal.
   bool IsStringLiteral();
 
   // True iff the expression is the null literal.
   bool IsNullLiteral();
 
   // True if we can prove that the expression is the undefined literal.
   bool IsUndefinedLiteral(Isolate* isolate);
 
-  bool IsIdentifier();
-
-  bool IsIdentifierNamed(String* name);
-
   // Expression type bounds
   Bounds bounds() { return bounds_; }
   void set_bounds(Bounds bounds) { bounds_ = bounds; }
 
   // Type feedback information for assignments and properties.
   virtual bool IsMonomorphic() {
     UNREACHABLE();
     return false;
   }
   virtual SmallMapList* GetReceiverTypes() {
@@ skipping 2932 matching lines @@
 
  private:
   Zone* zone_;
   Visitor visitor_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_