dart2js: run dartfmt on tests

tests/compiler/dart2js/serialization/native_data_test.dart

Index: tests/compiler/dart2js/serialization/native_data_test.dart
diff --git a/tests/compiler/dart2js/serialization/native_data_test.dart b/tests/compiler/dart2js/serialization/native_data_test.dart
index d2a917366bacd987c272dfa8a19a2ec170238dc2..04e3ab4741a43cfce20793b7b0c26a264ef2f489 100644
--- a/tests/compiler/dart2js/serialization/native_data_test.dart
+++ b/tests/compiler/dart2js/serialization/native_data_test.dart
@@ -50,28 +50,16 @@ Future checkNativeData(Uri uri, {bool verbose: false}) async {
   NativeData nativeData1 = backend1.nativeData;
   NativeData nativeData2 = backend2.nativeData;
 
-  checkMaps(
-      nativeData1.jsInteropNames,
-      nativeData2.jsInteropNames,
-      "NativeData.jsInteropNames",
-      areElementsEquivalent,
-      equality,
+  checkMaps(nativeData1.jsInteropNames, nativeData2.jsInteropNames,
+      "NativeData.jsInteropNames", areElementsEquivalent, equality,
       verbose: verbose);
 
-  checkMaps(
-      nativeData1.nativeMemberName,
-      nativeData2.nativeMemberName,
-      "NativeData.nativeMemberName",
-      areElementsEquivalent,
-      equality,
+  checkMaps(nativeData1.nativeMemberName, nativeData2.nativeMemberName,
+      "NativeData.nativeMemberName", areElementsEquivalent, equality,
       verbose: verbose);
 
-  checkMaps(
-      nativeData1.nativeClassTagInfo,
-      nativeData2.nativeClassTagInfo,
-      "NativeData.nativeClassTagInfo",
-      areElementsEquivalent,
-      equality,
+  checkMaps(nativeData1.nativeClassTagInfo, nativeData2.nativeClassTagInfo,
+      "NativeData.nativeClassTagInfo", areElementsEquivalent, equality,
       verbose: verbose);
 
   checkMaps(