Change logic for recording redirect pattern histograms.

components/subresource_filter/core/common/activation_list.h

Index: components/subresource_filter/core/common/activation_list.h
diff --git a/components/subresource_filter/core/common/activation_list.h b/components/subresource_filter/core/common/activation_list.h
index c24118ba7158e1c13f3c082e1775eb67e39fbeb1..a3aac0357d087fd5d444074dcafce8eb8728adba 100644
--- a/components/subresource_filter/core/common/activation_list.h
+++ b/components/subresource_filter/core/common/activation_list.h
@@ -7,6 +7,8 @@
 
 #include <iosfwd>
 
+#include "components/safe_browsing_db/util.h"
+
 namespace subresource_filter {
 
 enum class ActivationList {
@@ -19,6 +21,10 @@ enum class ActivationList {
 // 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_