Add the client for accessing Subresource Filter only list.

components/subresource_filter/core/common/activation_list.cc

Index: components/subresource_filter/core/common/activation_list.cc
diff --git a/components/subresource_filter/core/common/activation_list.cc b/components/subresource_filter/core/common/activation_list.cc
index f0ff340049003403fe5cc89042fdfa4a4444002d..e87775782578a356ed411e584fe344863bb52c1c 100644
--- a/components/subresource_filter/core/common/activation_list.cc
+++ b/components/subresource_filter/core/common/activation_list.cc
@@ -21,6 +21,9 @@ std::ostream& operator<<(std::ostream& os, const ActivationList& type) {
     case ActivationList::PHISHING_INTERSTITIAL:
       os << "PHISHING_INTERSTITIAL";
       break;
+    case ActivationList::SUBRESOURCE_FILTER:
+      os << "SUBRESOURCE_FILTER";
+      break;
     default:
       NOTREACHED();
       break;
@@ -41,6 +44,8 @@ ActivationList GetListForThreatTypeAndMetadata(
       return ActivationList::SOCIAL_ENG_ADS_INTERSTITIAL;
     }
     return ActivationList::PHISHING_INTERSTITIAL;
+  } else if (threat_type == safe_browsing::SB_THREAT_TYPE_SUBRESOURCE_FILTER) {
+    return ActivationList::SUBRESOURCE_FILTER;
   }
   return ActivationList::NONE;
 }