[Extensions] Fix FeatureProvider::GetChildren()

extensions/common/features/feature_provider.cc

Index: extensions/common/features/feature_provider.cc
diff --git a/extensions/common/features/feature_provider.cc b/extensions/common/features/feature_provider.cc
index 99213c7ff531dceb553c0b7da8cd6feaebf28165..5e5b14519e50e55c49f0ed5c6fbbaf2da213a24b 100644
--- a/extensions/common/features/feature_provider.cc
+++ b/extensions/common/features/feature_provider.cc
@@ -164,7 +164,8 @@ std::vector<Feature*> FeatureProvider::GetChildren(
   result.reserve(std::distance(first_child, after_children));
   for (FeatureMap::const_iterator it = first_child; it != after_children;
        ++it) {
-    result.push_back(it->second.get());
+    if (!it->second->no_parent())
+      result.push_back(it->second.get());
   }
   return result;
 }