Reland of Further reduction of feature_compiler.py generated code

extensions/common/features/base_feature_provider.h

 // 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.
 
 #ifndef EXTENSIONS_COMMON_FEATURES_BASE_FEATURE_PROVIDER_H_
 #define EXTENSIONS_COMMON_FEATURES_BASE_FEATURE_PROVIDER_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 23 matching lines @@
   Feature* GetParent(Feature* feature) const override;
   std::vector<Feature*> GetChildren(const Feature& parent) const override;
 
   const FeatureMap& GetAllFeatures() const override;
 
  protected:
   BaseFeatureProvider();
 
   void AddFeature(base::StringPiece name, std::unique_ptr<Feature> feature);
 
+  // Takes ownership. Used in preference to unique_ptr variant to reduce size
+  // of generated code.
+  void AddFeature(base::StringPiece name, Feature* feature);
+
  private:
   std::map<std::string, std::unique_ptr<Feature>> features_;
 
   DISALLOW_COPY_AND_ASSIGN(BaseFeatureProvider);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_FEATURES_BASE_FEATURE_PROVIDER_H_