Fix two memory leaks in SecureSocket.

runtime/include/dart_api.h

Index: runtime/include/dart_api.h
diff --git a/runtime/include/dart_api.h b/runtime/include/dart_api.h
index 8b9070cfdad9ff34d6cc68fee3d8c32e958fb8a5..df7c7c3ea6825ffbe908cb40999691d78b1f0122 100755
--- a/runtime/include/dart_api.h
+++ b/runtime/include/dart_api.h
@@ -475,8 +475,8 @@ DART_EXPORT void Dart_DeletePersistentHandle(Dart_PersistentHandle object);
  *   after the object is garbage collected, unless the handle has been deleted.
  *   A valid callback needs to be specified it cannot be NULL.
  *
- * \return Success if the weak persistent handle was
- *   created. Otherwise, returns an error.
+ * \return Returns the new weak persistent handle.
+     Returns NULL if and only if the callback is NULL.

[Søren Gjesse, 2015/09/02 16:24:31]

Please check this with the VM team.

[Bill Hesse, 2015/09/03 08:47:00]

They haven't looked at it, so removing it.

  */
 DART_EXPORT Dart_WeakPersistentHandle Dart_NewWeakPersistentHandle(
     Dart_Handle object,