Run dartfmt on all files under runtime.

runtime/observatory/tests/service/file_service_test.dart

Index: runtime/observatory/tests/service/file_service_test.dart
diff --git a/runtime/observatory/tests/service/file_service_test.dart b/runtime/observatory/tests/service/file_service_test.dart
index 25500c665f8980fdfc96932dc8ec1eadc48903b0..2b455e6f06fc1060ef90c20d209579ec2f700bb8 100644
--- a/runtime/observatory/tests/service/file_service_test.dart
+++ b/runtime/observatory/tests/service/file_service_test.dart
@@ -27,7 +27,7 @@ Future setupFiles() async {
 
   Future<ServiceExtensionResponse> cleanup(ignored_a, ignored_b) {
     closeDown();
-    var result = JSON.encode({'type' : 'foobar'});
+    var result = JSON.encode({'type': 'foobar'});
     return new Future.value(new ServiceExtensionResponse.result(result));
   }
 
@@ -56,14 +56,14 @@ Future setupFiles() async {
       var readTemp = new io.File(writeTemp);
       var result = await readTemp.readAsString();
       expect(result, equals('foobar'));
-
     } catch (e) {
       closeDown();
       throw e;
     }
-    var result = JSON.encode({'type' : 'foobar'});
+    var result = JSON.encode({'type': 'foobar'});
     return new Future.value(new ServiceExtensionResponse.result(result));
   }
+
   registerExtension('ext.dart.io.cleanup', cleanup);
   registerExtension('ext.dart.io.setup', setup);
 }
@@ -78,7 +78,7 @@ var fileTests = [
 
       expect(result['data'].length, equals(2));
       var writing = await isolate.invokeRpcNoUpgrade(
-           'ext.dart.io.getFileByID', { 'id' : result['data'][0]['id'] });
+          'ext.dart.io.getFileByID', {'id': result['data'][0]['id']});
 
       expect(writing['totalRead'], equals(0));
       expect(writing['readCount'], equals(0));
@@ -88,7 +88,7 @@ var fileTests = [
       expect(writing['lastRead'], equals(0));
 
       var reading = await isolate.invokeRpcNoUpgrade(
-          'ext.dart.io.getFileByID', { 'id' : result['data'][1]['id'] });
+          'ext.dart.io.getFileByID', {'id': result['data'][1]['id']});
 
       expect(reading['totalRead'], equals(5));
       expect(reading['readCount'], equals(5));
@@ -96,11 +96,10 @@ var fileTests = [
       expect(reading['totalWritten'], equals(0));
       expect(reading['lastWrite'], equals(0));
       expect(reading['lastRead'], greaterThan(0));
-
     } finally {
       await isolate.invokeRpcNoUpgrade('ext.dart.io.cleanup', {});
     }
   },
 ];
 
-main(args) async => runIsolateTests(args, fileTests, testeeBefore:setupFiles);
+main(args) async => runIsolateTests(args, fileTests, testeeBefore: setupFiles);