Support API aliases

extensions/common/features/feature.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_H_
 #define EXTENSIONS_COMMON_FEATURES_FEATURE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 76 matching lines @@
     const std::string message_;
   };
 
   Feature();
   virtual ~Feature();
 
   const std::string& name() const { return name_; }
   // Note that this arg is passed as a StringPiece to avoid a lot of bloat from
   // inlined std::string code.
   void set_name(base::StringPiece name);
+  const std::string& alias() const { return alias_; }
+  void set_alias(base::StringPiece alias);
+  const std::string& source() const { return source_; }
+  void set_source(base::StringPiece source);
   bool no_parent() const { return no_parent_; }
 
   // Gets the platform the code is currently running on.
   static Platform GetCurrentPlatform();
 
   // Tests whether this is an internal API or not.
   virtual bool IsInternal() const = 0;
 
   // Returns true if the feature is available to be parsed into a new extension
   // manifest.
@@ skipping 36 matching lines @@
   // method instead.
   Availability IsAvailableToEnvironment() const;
 
   virtual bool IsIdInBlacklist(const std::string& extension_id) const = 0;
   virtual bool IsIdInWhitelist(const std::string& extension_id) const = 0;
 
   void set_check_channel(bool check_channel) { check_channel_ = check_channel; }
 
  protected:
   std::string name_;
+  std::string alias_;
+  std::string source_;
   bool no_parent_;
   // TODO(devlin): Remove this once we set the feature channel for tests.
   bool check_channel_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_FEATURES_FEATURE_H_