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

tests/standalone/io/stream_pipe_test.dart

Index: tests/standalone/io/stream_pipe_test.dart
diff --git a/tests/standalone/io/stream_pipe_test.dart b/tests/standalone/io/stream_pipe_test.dart
index 8775b86e25046b104ac1be5d33a360244c056a60..3468aaec133c7a86365371c92684891d0a18dd10 100644
--- a/tests/standalone/io/stream_pipe_test.dart
+++ b/tests/standalone/io/stream_pipe_test.dart
@@ -6,10 +6,11 @@
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
+library ServerTest;
 
-#import("dart:io");
-#import("dart:isolate");
-#source("testing_server.dart");
+import "dart:io";
+import "dart:isolate";
+part "testing_server.dart";
 
 // Helper method to be able to run the test from the runtime
 // directory, or the top directory.