Revert "Fix observatory tests broken by running dartfmt."

runtime/observatory/tests/service/get_retained_size_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
 
 import 'package:observatory/service_io.dart';
 import 'package:unittest/unittest.dart';
 
 import 'test_helper.dart';
 
@@ skipping 11 matching lines @@
   Map params = {
     'targetId': isolate.rootLibrary.id,
     'expression': expression,
   };
   return await isolate.invokeRpcNoUpgrade('evaluate', params);
 }
 
 var tests = [
   (Isolate isolate) async {
     // One instance of _TestClass retained.
-    var evalResult = await eval(isolate, 'myVar = new _TestClass(null, null)');
+    var evalResult = await eval(
+        isolate, 'myVar = new _TestClass(null, null)');
     var params = {
       'targetId': evalResult['id'],
     };
     var result = await isolate.invokeRpcNoUpgrade('_getRetainedSize', params);
     expect(result['type'], equals('@Instance'));
     expect(result['kind'], equals('Int'));
     int value1 = int.parse(result['valueAsString']);
     expect(value1, isPositive);
 
     // Two instances of _TestClass retained.
@@ skipping 18 matching lines @@
     result = await isolate.invokeRpcNoUpgrade('_getRetainedSize', params);
     expect(result['type'], equals('@Instance'));
     expect(result['kind'], equals('Int'));
     int value3 = int.parse(result['valueAsString']);
     expect(value3, isPositive);
     expect(value3, equals(value2));
   },
 ];
 
 main(args) async => runIsolateTests(args, tests);