Remove deprecated string features.

utils/template/tokenizer.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class Tokenizer extends TokenizerBase {
   TokenKind tmplTokens;
 
   bool _selectorParsing;
 
   Tokenizer(SourceFile source, bool skipWhitespace, [int index = 0])
@@ skipping 115 matching lines @@
     if (tokId == -1) {
       tokId = TokenKind.matchKeywords(_text, _startIndex, _index - _startIndex);
     }
 
     return tokId >= 0 ? tokId : TokenKind.IDENTIFIER;
   }
 
   // Need to override so CSS version of isIdentifierPart is used.
   Token finishIdentifier() {
     while (_index < _text.length) {
-//      if (!TokenizerHelpers.isIdentifierPart(_text.charCodeAt(_index++))) {
-      if (!TokenizerHelpers.isIdentifierPart(_text.charCodeAt(_index))) {
+//      if (!TokenizerHelpers.isIdentifierPart(_text.codeUnitAt(_index++))) {
+      if (!TokenizerHelpers.isIdentifierPart(_text.codeUnitAt(_index))) {
 //        _index--;
         break;
       } else {
         _index += 1;
       }
     }
     if (_interpStack != null && _interpStack.depth == -1) {
       _interpStack.depth = 0;
     }
     int kind = getIdentifierKind();
@@ skipping 54 matching lines @@
       } else {
         _index -= 1;
       }
     }
 
     return _finishToken(TokenKind.INTEGER);
   }
 
   bool maybeEatDigit() {
     if (_index < _text.length && TokenizerHelpers.isDigit(
-        _text.charCodeAt(_index))) {
+        _text.codeUnitAt(_index))) {
       _index += 1;
       return true;
     }
     return false;
   }
 
   void eatHexDigits() {
     while (_index < _text.length) {
-     if (TokenizerHelpers.isHexDigit(_text.charCodeAt(_index))) {
+     if (TokenizerHelpers.isHexDigit(_text.codeUnitAt(_index))) {
        _index += 1;
      } else {
        return;
      }
     }
   }
 
   bool maybeEatHexDigit() {
     if (_index < _text.length && TokenizerHelpers.isHexDigit(
-        _text.charCodeAt(_index))) {
+        _text.codeUnitAt(_index))) {
       _index += 1;
       return true;
     }
     return false;
   }
 
   Token finishMultiLineComment() {
     while (true) {
       int ch = _nextChar();
       if (ch == 0) {
@@ skipping 60 matching lines @@
   }
 
   static bool isSlash(int c) {
     return (c == 47/* / */);
   }
 
   static bool isCloseTag(int c) {
     return (c == 62/* > */);
   }
 }