Revert of Further reduction of feature_compiler.py generated code

extensions/common/features/base_feature_provider.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/common/features/base_feature_provider.h"
 
 #include <utility>
 
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
@@ skipping 48 matching lines @@
     result.push_back(it->second.get());
   }
   return result;
 }
 
 void BaseFeatureProvider::AddFeature(base::StringPiece name,
                                      std::unique_ptr<Feature> feature) {
   features_[name.as_string()] = std::move(feature);
 }
 
-void BaseFeatureProvider::AddFeature(base::StringPiece name, Feature* feature) {
-  features_[name.as_string()] = std::unique_ptr<Feature>(feature);
-}
-
 }  // namespace extensions