Revert "Fix observatory tests broken by running dartfmt."

runtime/observatory/tests/service/gc_test.dart

Index: runtime/observatory/tests/service/gc_test.dart
diff --git a/runtime/observatory/tests/service/gc_test.dart b/runtime/observatory/tests/service/gc_test.dart
index 7f1c402e1149cd75a6ff570a565b7712e16e5e84..c21c85834c0d5800eabd41ac0791f060dfaddf42 100644
--- a/runtime/observatory/tests/service/gc_test.dart
+++ b/runtime/observatory/tests/service/gc_test.dart
@@ -21,23 +21,25 @@ void script() {
 }
 
 var tests = [
-  (Isolate isolate) {
-    Completer completer = new Completer();
-    // Expect at least this many GC events.
-    int gcCountdown = 3;
-    isolate.vm.getEventStream(VM.kGCStream).then((stream) {
-      var subscription;
-      subscription = stream.listen((ServiceEvent event) {
-        assert(event.kind == ServiceEvent.kGC);
-        print('Received GC event');
-        if (--gcCountdown == 0) {
-          subscription.cancel();
-          completer.complete();
-        }
-      });
+
+(Isolate isolate) {
+  Completer completer = new Completer();
+  // Expect at least this many GC events.
+  int gcCountdown = 3;
+  isolate.vm.getEventStream(VM.kGCStream).then((stream) {
+    var subscription;
+    subscription = stream.listen((ServiceEvent event) {
+      assert(event.kind == ServiceEvent.kGC);
+      print('Received GC event');
+      if (--gcCountdown == 0) {
+        subscription.cancel();
+        completer.complete();
+      }
     });
-    return completer.future;
-  },
+  });
+  return completer.future;
+},
+
 ];
 
 main(args) => runIsolateTests(args, tests, testeeConcurrent: script);