Remove deprecated string features.

utils/tests/string_encoding/unicode_test.dart

Index: utils/tests/string_encoding/unicode_test.dart
diff --git a/utils/tests/string_encoding/unicode_test.dart b/utils/tests/string_encoding/unicode_test.dart
index 054ff45e01933ff419b39b9cf7e8877e10f864bd..5b57377d811eec8cdd64d88643ac476aa60d3e3c 100755
--- a/utils/tests/string_encoding/unicode_test.dart
+++ b/utils/tests/string_encoding/unicode_test.dart
@@ -5,7 +5,7 @@
 
 library unicode_tests;
 import 'dunit.dart';
-import '../../../lib/utf/utf.dart';
+import '../../../sdk/lib/utf/utf.dart';
 
 void main() {
   TestSuite suite = new TestSuite();
@@ -30,7 +30,7 @@ class UnicodeTests extends TestClass {
   }
 
   void testStringCharCodes() {
-    Expect.listEquals(testCodepoints, testPhrase.charCodes());
+    Expect.listEquals(testCodepoints, testPhrase.codeUnits);
   }
 
   void testCodepointsToString() {
@@ -42,6 +42,6 @@ class UnicodeTests extends TestClass {
   }
 
   void testEmptyStringCharCodes() {
-    Expect.listEquals([], "".charCodes());
+    Expect.listEquals([], "".codeUnits);
   }
 }