Further reduction of feature_compiler.py generated code

extensions/common/features/complex_feature.cc

Index: extensions/common/features/complex_feature.cc
diff --git a/extensions/common/features/complex_feature.cc b/extensions/common/features/complex_feature.cc
index 5f041dbbc982786192cf3db7d81f36cc041dcbc5..fa5325c7afcbd62f0782a0a2354cf6ad79c25b13 100644
--- a/extensions/common/features/complex_feature.cc
+++ b/extensions/common/features/complex_feature.cc
@@ -6,9 +6,10 @@
 
 namespace extensions {
 
-ComplexFeature::ComplexFeature(std::unique_ptr<FeatureList> features) {
-  DCHECK_GT(features->size(), 0UL);
-  features_.swap(*features);
+ComplexFeature::ComplexFeature(const std::vector<Feature*>& features) {
+  DCHECK_GT(features.size(), 0UL);
+  for (Feature* f : features)
+    features_.push_back(std::unique_ptr<Feature>(f));
   no_parent_ = features_[0]->no_parent();
 
 #if !defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)