Change logic for recording redirect pattern histograms.

components/subresource_filter/content/browser/content_activation_list_utils.cc

Index: components/subresource_filter/content/browser/content_activation_list_utils.cc
diff --git a/components/subresource_filter/content/browser/content_activation_list_utils.cc b/components/subresource_filter/content/browser/content_activation_list_utils.cc
new file mode 100644
index 0000000000000000000000000000000000000000..6689d600a6be3fc5ef7b0af4d4cd22b01d88a7fe
--- /dev/null
+++ b/components/subresource_filter/content/browser/content_activation_list_utils.cc
@@ -0,0 +1,26 @@
+// Copyright 2017 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.
+
+#include "components/subresource_filter/content/browser/content_activation_list_utils.h"
+
+namespace subresource_filter {
+
+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