Remove deprecated StringBuffer.add, addAll and addCharCode.

utils/css/tokenkind.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.
 
 // TODO(terry): Need to be consistent with tokens either they're ASCII tokens
 //              e.g., ASTERISK or they're CSS e.g., PSEUDO, COMBINATOR_*.
 class TokenKind {
   // Common shared tokens used in TokenizerBase.
   static const int UNUSED = 0;                  // Unused place holder...
   static const int END_OF_FILE = 1;             // TODO(terry): Must match base
@@ skipping 469 matching lines @@
     result.add(_HEX_DIGITS[remain]);
     while (dividend != 0) {
       remain = dividend % 16;
       dividend >>= 4;
       result.add(_HEX_DIGITS[remain]);
     }
 
     StringBuffer invertResult = new StringBuffer();
     int paddings = minDigits - result.length;
     while (paddings-- > 0) {
-      invertResult.add('0');
+      invertResult.write('0');
     }
     for (int idx = result.length - 1; idx >= 0; idx--) {
-      invertResult.add(result[idx]);
+      invertResult.write(result[idx]);
     }
 
     return invertResult.toString();
   }
 
   static String kindToString(int kind) {
     switch(kind) {
       case TokenKind.UNUSED: return "ERROR";
       case TokenKind.END_OF_FILE: return "end of file";
       case TokenKind.LPAREN: return "(";
@@ skipping 83 matching lines @@
   }
 
 }
 
 class NoColorMatchException implements Exception {
   String _colorName;
   NoColorMatchException(this._colorName);
 
   String get name => _colorName;
 }