Format all tests.

tests/compiler/dart2js_native/native_null_frog_test.dart

Index: tests/compiler/dart2js_native/native_null_frog_test.dart
diff --git a/tests/compiler/dart2js_native/native_null_frog_test.dart b/tests/compiler/dart2js_native/native_null_frog_test.dart
index 9bd08eb0721cddf0e0bc1ad510d7ae9b55082990..51a138b1c6f2ced53de08c8e327baa3ed00ba662 100644
--- a/tests/compiler/dart2js_native/native_null_frog_test.dart
+++ b/tests/compiler/dart2js_native/native_null_frog_test.dart
@@ -8,13 +8,13 @@ import "native_testing.dart";
 
 @Native("A")
 class A {
-  returnNull() native ;
-  returnUndefined() native ;
-  returnEmptyString() native ;
-  returnZero() native ;
+  returnNull() native;
+  returnUndefined() native;
+  returnEmptyString() native;
+  returnZero() native;
 }
 
-A makeA() native ;
+A makeA() native;
 
 void setup() native """
 function A() {}