Make core libraries use generic method syntax.

tests/lib/convert/chunked_conversion1_test.dart

Index: tests/lib/convert/chunked_conversion1_test.dart
diff --git a/tests/lib/convert/chunked_conversion1_test.dart b/tests/lib/convert/chunked_conversion1_test.dart
index 0bbe44b7f700e48d42426c1c1ee62fe7cbf08b85..ff386e1eaebcd68f376eeb381554db9214f8c7c4 100644
--- a/tests/lib/convert/chunked_conversion1_test.dart
+++ b/tests/lib/convert/chunked_conversion1_test.dart
@@ -9,7 +9,7 @@ import 'package:expect/expect.dart';
 // This test implements a new special interface that can be used to
 // send data more efficiently between two converters.
 
-abstract class MyChunkedIntSink extends ChunkedConversionSink<int> {
+abstract class MyChunkedIntSink extends ChunkedConversionSink<List<int>> {
   MyChunkedIntSink();
   factory MyChunkedIntSink.from(sink) = IntAdapterSink;
   factory MyChunkedIntSink.withCallback(callback) {