Remove deprecated "i::" prefix from the preparser.

src/preparser.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 200 matching lines @@
 // See preparse-data-format.h for the data format.
 
 // The PreParser checks that the syntax follows the grammar for JavaScript,
 // and collects some information about the program along the way.
 // The grammar check is only performed in order to understand the program
 // sufficiently to deduce some information about it, that can be used
 // to speed up later parsing. Finding errors is not the goal of pre-parsing,
 // rather it is to speed up properly written and correct programs.
 // That means that contextual checks (like a label being declared where
 // it is used) are generally omitted.
-
-typedef uint8_t byte;
-namespace i = v8::internal;
-
 class PreParser : public ParserBase {
  public:
   enum PreParseResult {
     kPreParseStackOverflow,
     kPreParseSuccess
   };
 
   PreParser(Scanner* scanner,
             ParserRecorder* log,
             uintptr_t stack_limit)
@@ skipping 452 matching lines @@
   ParserRecorder* log_;
   Scope* scope_;
   Scanner::Location strict_mode_violation_location_;
   const char* strict_mode_violation_type_;
   bool parenthesized_function_;
 };
 
 } }  // v8::internal
 
 #endif  // V8_PREPARSER_H