Run dartfmt on all files under runtime.

runtime/observatory/tests/service/get_vm_timeline_rpc_test.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // 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.
 // VMOptions=--error_on_bad_type --error_on_bad_override --complete_timeline
 
 import 'dart:developer';
 import 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';
 
 import 'test_helper.dart';
@@ skipping 87 matching lines @@
     expect(eventsContains(dartEvents, 'I', 'ISYNC'), isTrue);
     expect(eventsContains(dartEvents, 'X', 'apple'), isTrue);
     expect(eventsContains(dartEvents, 'b', 'TASK1'), isTrue);
     expect(eventsContains(dartEvents, 'e', 'TASK1'), isTrue);
     expect(eventsContains(dartEvents, 'n', 'ITASK'), isTrue);
     expect(eventsContains(dartEvents, 'q', 'ITASK'), isFalse);
     // Calculate the time Window of Dart events.
     int origin = timeOrigin(dartEvents);
     int extent = timeDuration(dartEvents, origin);
     // Query for the timeline with the time window for Dart events.
-    result = await vm.invokeRpcNoUpgrade('_getVMTimeline', {
-      'timeOriginMicros': origin,
-      'timeExtentMicros': extent
-    });
+    result = await vm.invokeRpcNoUpgrade('_getVMTimeline',
+        {'timeOriginMicros': origin, 'timeExtentMicros': extent});
     // Verify that we received fewer events than before.
     expect(result['traceEvents'].length, lessThan(numEvents));
     // Verify that we have the same number of Dart events.
     List<Map> dartEvents2 = filterForDartEvents(result['traceEvents']);
     expect(dartEvents2.length, dartEvents.length);
   },
 ];
 
 main(args) async => runVMTests(args, tests, testeeBefore: primeTimeline);