Remove deprecated string features.

sdk/lib/_internal/compiler/implementation/lib/js_string.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.
 
 part of _interceptors;
 
 /**
  * The interceptor class for [String]. The compiler recognizes this
  * class as an interceptor, and changes references to [:this:] to
  * actually use the receiver of the method, which is generated as an extra
  * argument added to each member.
  */
 class JSString implements String {
   const JSString();
 
-  int charCodeAt(index) => codeUnitAt(index);
-
   int codeUnitAt(int index) {
     if (index is !num) throw new ArgumentError(index);
     if (index < 0) throw new RangeError.value(index);
     if (index >= length) throw new RangeError.value(index);
     return JS('int', r'#.charCodeAt(#)', this, index);
   }
 
   Iterable<Match> allMatches(String str) {
     checkString(str);
     return allMatchesInStringUnchecked(this, str);
@@ skipping 36 matching lines @@
     if (pattern is String) {
       return JS('=List', r'#.split(#)', this, pattern);
     } else if (pattern is JSSyntaxRegExp) {
       var re = regExpGetNative(pattern);
       return JS('=List', r'#.split(#)', this, re);
     } else {
       throw "String.split(Pattern) UNIMPLEMENTED";
     }
   }
 
-  List<String> splitChars() {
-    return JS('=List', r'#.split("")', this);
-  }
-
   bool startsWith(String other) {
     checkString(other);
     int otherLength = other.length;
     if (otherLength > length) return false;
     return JS('bool', r'# == #', other,
               JS('String', r'#.substring(0, #)', this, otherLength));
   }
 
   String substring(int startIndex, [int endIndex]) {
     checkNum(startIndex);
@@ skipping 46 matching lines @@
   }
 
   String toUpperCase() {
     return JS('String', r'#.toUpperCase()', this);
   }
 
   String trim() {
     return JS('String', r'#.trim()', this);
   }
 
-  List<int> get charCodes  {
-    List<int> result = new List<int>.fixedLength(length);
-    for (int i = 0; i < length; i++) {
-      result[i] = JS('int', '#.charCodeAt(#)', this, i);
-    }
-    return result;
-  }
-
-  Iterable<int> get codeUnits => new CodeUnits(this);
+  List<int> get codeUnits => new CodeUnits(this);
 
   Runes get runes => new Runes(this);
 
   int indexOf(String other, [int start = 0]) {
     checkNull(other);
     if (start is !int) throw new ArgumentError(start);
     if (other is !String) throw new ArgumentError(other);
     if (start < 0) return -1;
     return JS('int', r'#.indexOf(#, #)', this, other, start);
   }
@@ skipping 53 matching lines @@
   Type get runtimeType => String;
 
   int get length => JS('int', r'#.length', this);
 
   String operator [](int index) {
     if (index is !int) throw new ArgumentError(index);
     if (index >= length || index < 0) throw new RangeError.value(index);
     return JS('String', '#[#]', this, index);
   }
 }