Change logic for recording redirect pattern histograms.

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 090eeae134cee791cea1a9e1d61718180dbcce4c..f0ff340049003403fe5cc89042fdfa4a4444002d 100644
--- a/components/subresource_filter/core/common/activation_list.cc
+++ b/components/subresource_filter/core/common/activation_list.cc
@@ -28,4 +28,21 @@ std::ostream& operator<<(std::ostream& os, const ActivationList& type) {
   return os;
 }
 
+ActivationList GetListForThreatTypeAndMetadata(
+    safe_browsing::SBThreatType threat_type,
+    safe_browsing::ThreatPatternType threat_type_metadata) {
+  bool is_phishing_interstitial =
+      (threat_type == safe_browsing::SB_THREAT_TYPE_URL_PHISHING);
+  bool is_soc_engineering_ads_interstitial =
+      threat_type_metadata ==
+      safe_browsing::ThreatPatternType::SOCIAL_ENGINEERING_ADS;
+  if (is_phishing_interstitial) {
+    if (is_soc_engineering_ads_interstitial) {
+      return ActivationList::SOCIAL_ENG_ADS_INTERSTITIAL;
+    }
+    return ActivationList::PHISHING_INTERSTITIAL;
+  }
+  return ActivationList::NONE;
+}
+
 }  // namespace subresource_filter