Add the client for accessing Subresource Filter only list.

components/subresource_filter/core/common/activation_list.h

 // Copyright 2016 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 COMPONENTS_SUBRESOURCE_FILTER_CORE_COMMON_ACTIVATION_LIST_H_
 #define COMPONENTS_SUBRESOURCE_FILTER_CORE_COMMON_ACTIVATION_LIST_H_
 
 #include <iosfwd>
 
 #include "components/safe_browsing_db/util.h"
 
 namespace subresource_filter {
 
 enum class ActivationList {
   NONE,
   SOCIAL_ENG_ADS_INTERSTITIAL,
   PHISHING_INTERSTITIAL,
-  LAST = PHISHING_INTERSTITIAL,
+  SUBRESOURCE_FILTER,
+  LAST = SUBRESOURCE_FILTER,
 };
 
 // For logging use only.
 std::ostream& operator<<(std::ostream& os, const ActivationList& type);
 
 ActivationList GetListForThreatTypeAndMetadata(
     safe_browsing::SBThreatType threat_type,
     safe_browsing::ThreatPatternType threat_type_metadata);
 
 }  // namespace subresource_filter
 
 #endif  // COMPONENTS_SUBRESOURCE_FILTER_CORE_COMMON_ACTIVATION_LIST_H_