Remove deprecated string features.

tests/corelib/string_test.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(ngeoffray): test String methods with null arguments.
 class StringTest {
 
   static testMain() {
     testOutOfRange();
     testIllegalArgument();
     testConcat();
     testIndex();
-    testCharCodeAt();
+    testCodeUnitAt();
     testEquals();
     testEndsWith();
     testStartsWith();
     testIndexOf();
     testLastIndexOf();
     testContains();
     testReplaceAll();
     testCompareTo();
-    testToList();
     testCharCodes();
   }
 
   static void testOutOfRange() {
     String a = "Hello";
     bool exception_caught = false;
     try {
       var c = a[20];  // Throw exception.
     } on RangeError catch (e) {
       exception_caught = true;
@@ skipping 16 matching lines @@
   }
 
   static testIndex() {
     String str = "string";
     for (int i = 0; i < str.length; i++) {
       Expect.equals(true, str[i] is String);
       Expect.equals(1, str[i].length);
     }
   }
 
-  static testCharCodeAt() {
+  static testCodeUnitAt() {
     String str = "string";
     for (int i = 0; i < str.length; i++) {
-      Expect.equals(true, str.charCodeAt(i) is int);
+      Expect.equals(true, str.codeUnitAt(i) is int);
     }
   }
 
   static testConcat() {
     var a = "One";
     var b = "Four";
     var c = a.concat(b);
     Expect.equals(7, c.length);
     Expect.equals("OneFour", c);
   }
@@ skipping 191 matching lines @@
 
   static testCompareTo() {
     Expect.equals(0, "".compareTo(""));
     Expect.equals(0, "str".compareTo("str"));
     Expect.equals(-1, "str".compareTo("string"));
     Expect.equals(1, "string".compareTo("str"));
     Expect.equals(1, "string".compareTo(""));
     Expect.equals(-1, "".compareTo("string"));
   }
 
-  static testToList() {
-    test(str) {
-      var list = str.splitChars();
-      Expect.equals(str.length, list.length);
-      for (int i = 0; i < str.length; i++) {
-        Expect.equals(str[i], list[i]);
-      }
-    }
-    test("abc");
-    test("");
-    test(" ");
-  }
-
   static testCharCodes() {
     test(str) {
-      var list = str.charCodes;
+      var list = str.codeUnits;
       Expect.equals(str.length, list.length);
       for (int i = 0; i < str.length; i++) {
-        Expect.equals(str.charCodeAt(i), list[i]);
+        Expect.equals(str.codeUnitAt(i), list[i]);
       }
     }
     test("abc");
     test("");
     test(" ");
   }
 }
 
 main() {
   StringTest.testMain();
 }