Make String.charCodes a getter.

tests/standalone/io/file_input_stream_test.dart

Index: tests/standalone/io/file_input_stream_test.dart
diff --git a/tests/standalone/io/file_input_stream_test.dart b/tests/standalone/io/file_input_stream_test.dart
index 31733b06b97f615b4edc135d506a80c6b98e161e..1b7475d6f8af1b0d9fe832ea11f3288c8d50e457 100644
--- a/tests/standalone/io/file_input_stream_test.dart
+++ b/tests/standalone/io/file_input_stream_test.dart
@@ -33,7 +33,7 @@ void testStringInputStreamSync() {
 void testInputStreamAsync() {
   String fileName = getFilename("tests/standalone/io/readuntil_test.dat");
   // File contains "Hello Dart\nwassup!\n"
-  var expected = "Hello Dart\nwassup!\n".charCodes();
+  var expected = "Hello Dart\nwassup!\n".charCodes;
   InputStream x = (new File(fileName)).openInputStream();
   var byteCount = 0;
   x.onData = () {
@@ -95,7 +95,7 @@ void testChunkedInputStream() {
 
 void testUnreadyInputStream() {
   String fileName = getFilename("tests/standalone/io/readuntil_test.dat");
-  var expected = "Hello Dart\nwassup!\n".charCodes();
+  var expected = "Hello Dart\nwassup!\n".charCodes;
   InputStream x = (new File(fileName)).openInputStream();
   List<int> buffer = new List<int>(100);