Patches to support Dart VM patch files in dart2js.

runtime/lib/string_patch.dart

 // Copyright (c) 2012, 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.
 
 const int _maxAscii = 0x7f;
 const int _maxLatin1 = 0xff;
 const int _maxUtf16 = 0xffff;
 const int _maxUnicode = 0x10ffff;
 
 patch class String {
@@ skipping 201 matching lines @@
 
   static String _createOneByteString(List<int> charCodes, int start, int len) {
     // It's always faster to do this in Dart than to call into the runtime.
     var s = _OneByteString._allocate(len);
     for (int i = 0; i < len; i++) {
       s._setAt(i, charCodes[start + i]);
     }
     return s;
   }
 
-  static String _createTwoByteString(List<int> charCodes, int start, int len) {
-    // TODO(lrn): Create string without scanning charCodes again - all values
-    // in the [start..end] range are uint16 values.
-    return _createFromCodePoints(charCodes, start, end);
-  }
-
   static String _createFromCodePoints(List<int> codePoints, int start, int end)
       native "StringBase_createFromCodePoints";
 
   String operator [](int index) native "String_charAt";
 
   int codeUnitAt(int index) native "String_codeUnitAt";
 
   int get length native "String_getLength";
 
   bool get isEmpty {
@@ skipping 1113 matching lines @@
     int end = index + _pattern.length;
     _current = new _StringMatch(index, _input, _pattern);
     // Empty match, don't start at same location again.
     if (end == _index) end++;
     _index = end;
     return true;
   }
 
   Match get current => _current;
 }