Fix an ASSERT in the scanner

src/scanner.h

 // Copyright 2006-2008 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 194 matching lines @@
 
   // Tells whether the buffer contains an identifier (no escapes).
   // Used for checking if a property name is an identifier.
   static bool IsIdentifier(unibrow::CharacterStream* buffer);
 
   static unibrow::Predicate<IdentifierStart, 128> kIsIdentifierStart;
   static unibrow::Predicate<IdentifierPart, 128> kIsIdentifierPart;
   static unibrow::Predicate<unibrow::LineTerminator, 128> kIsLineTerminator;
   static unibrow::Predicate<unibrow::WhiteSpace, 128> kIsWhiteSpace;
 
+  static const int kCharacterLookaheadBufferSize = 1;
+
  private:
   CharacterStreamUTF16Buffer char_stream_buffer_;
   TwoByteStringUTF16Buffer two_byte_string_buffer_;
 
   // Source.
   UTF16Buffer* source_;
   int position_;
 
   // Buffer to hold literal values (identifiers, strings, numbers)
   // using 0-terminated UTF-8 encoding.
@@ skipping 10 matching lines @@
     Token::Value token;
     Location location;
     int literal_pos, literal_end;
   };
 
   TokenDesc current_;  // desc for current token (as returned by Next())
   TokenDesc next_;     // desc for next token (one token look-ahead)
   bool has_line_terminator_before_next_;
   bool is_pre_parsing_;
 
-  static const int kCharacterLookaheadBufferSize = 1;
-
   // Literal buffer support
   void StartLiteral();
   void AddChar(uc32 ch);
   void AddCharAdvance();
   void TerminateLiteral();
 
   // Low-level scanning support.
   void Advance() { c0_ = source_->Advance(); }
   void PushBack(uc32 ch) {
     source_->PushBack(ch);
@@ skipping 25 matching lines @@
   }
 
   // Decodes a unicode escape-sequence which is part of an identifier.
   // If the escape sequence cannot be decoded the result is kBadRune.
   uc32 ScanIdentifierUnicodeEscape();
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_SCANNER_H_