Remove old #import, #source, and #library syntax from tests/standalone.

tests/standalone/io/chunked_stream_test.dart

Index: tests/standalone/io/chunked_stream_test.dart
diff --git a/tests/standalone/io/chunked_stream_test.dart b/tests/standalone/io/chunked_stream_test.dart
index 30c9349f47c661c0f06888aefb257008b9c60bca..9b4d00cf44bd58016171ec6a95c671d1fe70d0b0 100644
--- a/tests/standalone/io/chunked_stream_test.dart
+++ b/tests/standalone/io/chunked_stream_test.dart
@@ -2,8 +2,8 @@
 // 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.
 
-#import("dart:io");
-#import("dart:isolate");
+import "dart:io";
+import "dart:isolate";
 
 void test1() {
   void testWithChunkSize(var data, int chunkSize, Function testDone) {