Fix a couple broken tests in pub/validator_test.

utils/tests/pub/validator_test.dart

Index: utils/tests/pub/validator_test.dart
diff --git a/utils/tests/pub/validator_test.dart b/utils/tests/pub/validator_test.dart
index 2c3694583f78a36f6f334b52794faf0c6280e497..fcbb5617206fbee192da5b8262093df9556db9d6 100644
--- a/utils/tests/pub/validator_test.dart
+++ b/utils/tests/pub/validator_test.dart
@@ -552,7 +552,7 @@ main() {
       expectValidationError(size(10 * math.pow(2, 20) + 1));
     });
 
-    test('contains compiled dartdoc', () {
+    integration('contains compiled dartdoc', () {
       dir(appPath, [
         dir('doc-out', [
           file('nav.json', ''),
@@ -566,7 +566,7 @@ main() {
       expectValidationWarning(compiledDartdoc);
     });
 
-    test('has a README with invalid utf-8', () {
+    integration('has a README with invalid utf-8', () {
       dir(appPath, [
         binaryFile("README", [192])
       ]).scheduleCreate();