Run dartfmt on all files under runtime.

runtime/observatory/tests/service/metrics_test.dart

Index: runtime/observatory/tests/service/metrics_test.dart
diff --git a/runtime/observatory/tests/service/metrics_test.dart b/runtime/observatory/tests/service/metrics_test.dart
index d501f0390d02378a1e4facd25a71e6ae7ea02d9a..9e96a93d4432ec5f177cd91e556bee8202e904e8 100644
--- a/runtime/observatory/tests/service/metrics_test.dart
+++ b/runtime/observatory/tests/service/metrics_test.dart
@@ -16,7 +16,6 @@ void script() {
 }
 
 var tests = [
-
   (Isolate isolate) async {
     Map metrics = await isolate.refreshDartMetrics();
     expect(metrics.length, equals(1));
@@ -24,26 +23,24 @@ var tests = [
     expect(counter.name, equals('a.b.c'));
     expect(counter.value, equals(1234.5));
   },
-
   (Isolate isolate) async {
-    var params =  { 'metricId': 'metrics/a.b.c' };
+    var params = {'metricId': 'metrics/a.b.c'};
     ServiceMetric counter =
-      await isolate.invokeRpc('_getIsolateMetric', params);
+        await isolate.invokeRpc('_getIsolateMetric', params);
     expect(counter.name, equals('a.b.c'));
     expect(counter.value, equals(1234.5));
   },
-
   (Isolate isolate) async {
     bool caughtException;
     try {
-      await isolate.invokeRpc('_getIsolateMetric',
-                              { 'metricId': 'metrics/a.b.d' });
-      expect(false, isTrue, reason:'Unreachable');
+      await isolate
+          .invokeRpc('_getIsolateMetric', {'metricId': 'metrics/a.b.d'});
+      expect(false, isTrue, reason: 'Unreachable');
     } on ServerRpcException catch (e) {
       caughtException = true;
       expect(e.code, equals(ServerRpcException.kInvalidParams));
       expect(e.message,
-             "_getIsolateMetric: invalid 'metricId' parameter: metrics/a.b.d");
+          "_getIsolateMetric: invalid 'metricId' parameter: metrics/a.b.d");
     }
     expect(caughtException, isTrue);
   },