Run dartfmt on all files under runtime.

runtime/observatory/tests/service/get_ports_rpc_test.dart

Index: runtime/observatory/tests/service/get_ports_rpc_test.dart
diff --git a/runtime/observatory/tests/service/get_ports_rpc_test.dart b/runtime/observatory/tests/service/get_ports_rpc_test.dart
index 44a04d215ef2dfd12ffd176a7a9d2f0255787ac0..0feac563d8fc7a44852f1f1ee21f9a9a083fbd85 100644
--- a/runtime/observatory/tests/service/get_ports_rpc_test.dart
+++ b/runtime/observatory/tests/service/get_ports_rpc_test.dart
@@ -16,8 +16,7 @@ var port2;
 
 void warmup() {
   port1 = new RawReceivePort(null);
-  port2 = new RawReceivePort((_) {
-  });
+  port2 = new RawReceivePort((_) {});
 }
 
 int countHandlerMatches(ports, matcher) {
@@ -52,4 +51,4 @@ var tests = [
   },
 ];
 
-main(args) async => runIsolateTests(args, tests, testeeBefore:warmup);
+main(args) async => runIsolateTests(args, tests, testeeBefore: warmup);