Extensions: Only create Web request rules registry if Declarative Web Request is enabled.

extensions/common/features/simple_feature.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_SIMPLE_FEATURE_H_
 #define EXTENSIONS_COMMON_FEATURES_SIMPLE_FEATURE_H_
 
 #include <stddef.h>
 
 #include <initializer_list>
@@ skipping 58 matching lines @@
                                      Manifest::Location location,
                                      int manifest_version,
                                      Platform platform) const override;
   Availability IsAvailableToContext(const Extension* extension,
                                     Context context,
                                     const GURL& url,
                                     Platform platform) const override;
   bool IsInternal() const override;
   bool IsIdInBlacklist(const std::string& extension_id) const override;
   bool IsIdInWhitelist(const std::string& extension_id) const override;
+  Availability IsAvailableToChannel(
+      version_info::Channel channel) const override;
 
   static bool IsIdInArray(const std::string& extension_id,
                           const char* const array[],
                           size_t array_length);
 
   // Similar to Manifest::Location, these are the classes of locations
   // supported in feature files. These should only be used in this class and in
   // generated files.
   enum Location {
     UNSPECIFIED_LOCATION,
@@ skipping 145 matching lines @@
   bool is_internal_;
   std::string command_line_switch_;
   std::unique_ptr<version_info::Channel> channel_;
 
   DISALLOW_COPY_AND_ASSIGN(SimpleFeature);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_FEATURES_SIMPLE_FEATURE_H_