- Allow specifying of package: URIs for packageConfig and packageRoot when

runtime/lib/isolate_patch.dart

Index: runtime/lib/isolate_patch.dart
diff --git a/runtime/lib/isolate_patch.dart b/runtime/lib/isolate_patch.dart
index de652acac29bd1541f7e6cc96f3b52a9db2ada37..79c895a87a3206d1be92c84eb517672bc87e4568 100644
--- a/runtime/lib/isolate_patch.dart
+++ b/runtime/lib/isolate_patch.dart
@@ -378,6 +378,12 @@ patch class Isolate {
         }
       }
 
+      // Ensure to resolve package: URIs being handed in as parameters.
+      packageRoot = (packageRoot == null) ? null :
+          await Isolate.resolvePackageUri(packageRoot);
+      packageConfig = (packageConfig == null) ? null :
+          await Isolate.resolvePackageUri(packageConfig);
+
       // The VM will invoke [_startIsolate] and not `main`.
       readyPort = new RawReceivePort();
       var packageRootString = packageRoot?.toString();