Don't implicitly run "pub get".

test/dart2js/doesnt_support_invalid_type_for_boolean_option_test.dart

Index: test/dart2js/doesnt_support_invalid_type_for_boolean_option_test.dart
diff --git a/test/dart2js/doesnt_support_invalid_type_for_boolean_option_test.dart b/test/dart2js/doesnt_support_invalid_type_for_boolean_option_test.dart
index 91e43fc0bd0f3faf7d57ccf4630adcf6bd10567f..611368d393e94bc06024c4e6fa2b906008652d77 100644
--- a/test/dart2js/doesnt_support_invalid_type_for_boolean_option_test.dart
+++ b/test/dart2js/doesnt_support_invalid_type_for_boolean_option_test.dart
@@ -20,7 +20,8 @@ main() {
       d.dir("web", [d.file("main.dart", "void main() {}")])
     ]).create();
 
-    var server = pubServe(shouldGetFirst: true);
+    pubGet();
+    var server = pubServe();
     requestShould404("main.dart.js");
     server.stderr.expect(emitsLines(
         'Build error:\n'