Make "--no-packages-dir" the default.

test/get/hosted/get_test.dart

Index: test/get/hosted/get_test.dart
diff --git a/test/get/hosted/get_test.dart b/test/get/hosted/get_test.dart
index 01e2f501ca848fbe39e4bb6edbf273560e247e2e..3a5482810c62a56be9bd747fdbfbea1c1c5d7300 100644
--- a/test/get/hosted/get_test.dart
+++ b/test/get/hosted/get_test.dart
@@ -16,7 +16,7 @@ main() {
     pubGet();
 
     d.cacheDir({"foo": "1.2.3"}).validate();
-    d.packagesDir({"foo": "1.2.3"}).validate();
+    d.appPackagesFile({"foo": "1.2.3"}).validate();
   });
 
   integration('URL encodes the package name', () {
@@ -52,6 +52,6 @@ main() {
     pubGet();
 
     d.cacheDir({"foo": "1.2.3"}, port: server.port).validate();
-    d.packagesDir({"foo": "1.2.3"}).validate();
+    d.appPackagesFile({"foo": "1.2.3"}).validate();
   });
 }