Support self-referential package: imports with Pub.

utils/tests/pub/version_solver_test.dart

Index: utils/tests/pub/version_solver_test.dart
diff --git a/utils/tests/pub/version_solver_test.dart b/utils/tests/pub/version_solver_test.dart
index 51362f33cbcc60a0f42022467410a568a2bb0228..fe2a0a0760a8f090f3d21ead2ad68e716071d6f1 100644
--- a/utils/tests/pub/version_solver_test.dart
+++ b/utils/tests/pub/version_solver_test.dart
@@ -407,8 +407,9 @@ class MockSource extends Source {
           parsed.last, new VersionConstraint.parse(constraint), parsed.first));
     });
 
-    var pubspec = new Pubspec(new Version.parse(version), dependencies);
-    return new Package.inMemory(description, pubspec);
+    var pubspec = new Pubspec(
+        description, new Version.parse(version), dependencies);
+    return new Package.inMemory(pubspec);
   }
 
   void addPackage(Package package) {