[Extensions] Remove BaseFeatureProvider

extensions/common/features/base_feature_provider.h

Index: extensions/common/features/base_feature_provider.h
diff --git a/extensions/common/features/base_feature_provider.h b/extensions/common/features/base_feature_provider.h
deleted file mode 100644
index 1b840f393ca6141c3554b729e640cb2c2c43cfa9..0000000000000000000000000000000000000000
--- a/extensions/common/features/base_feature_provider.h
+++ /dev/null
@@ -1,56 +0,0 @@
-// 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>
-#include <vector>
-
-#include "base/macros.h"
-#include "base/strings/string_piece.h"
-#include "extensions/common/features/feature_provider.h"
-
-namespace extensions {
-class Feature;
-
-// A FeatureProvider contains the mapping of all feature names specified in the
-// _*_features.json files to the Feature classes. Look up a Feature by its name
-// to determine whether or not it is available in a certain context.
-// Subclasses implement the specific logic for how the features are populated;
-// this class handles vending the features given the query.
-// TODO(devlin): We could probably combine this and FeatureProvider, since both
-// contain common functionality and neither are designed to be full
-// implementations.
-class BaseFeatureProvider : public FeatureProvider {
- public:
-  ~BaseFeatureProvider() override;
-
-  // Gets the feature |feature_name|, if it exists.
-  Feature* GetFeature(const std::string& feature_name) const override;
-  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_