Add the basic infrastructure for the Behavior feature type: BehaviorFeature and

extensions/common/features/feature_provider.h

 // Copyright 2013 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_FEATURE_PROVIDER_H_
 #define EXTENSIONS_COMMON_FEATURES_FEATURE_PROVIDER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 19 matching lines @@
   // Returns all features described by this instance, in asciibetical order.
   virtual const std::vector<std::string>& GetAllFeatureNames() const = 0;
 
   // Gets a feature provider for a specific feature type, like "permission".
   static const FeatureProvider* GetByName(const std::string& name);
 
   // Directly access the common feature types.
   static const FeatureProvider* GetAPIFeatures();
   static const FeatureProvider* GetManifestFeatures();
   static const FeatureProvider* GetPermissionFeatures();
+  static const FeatureProvider* GetSwitchFeatures();
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_FEATURES_FEATURE_PROVIDER_H_