Metrics for tracking Safe Browsing hit patterns for the Safe Browsing lists Subresource Filter.

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
new file mode 100644
index 0000000000000000000000000000000000000000..090eeae134cee791cea1a9e1d61718180dbcce4c
--- /dev/null
+++ b/components/subresource_filter/core/common/activation_list.cc
@@ -0,0 +1,31 @@
+// 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.
+
+#include "components/subresource_filter/core/common/activation_list.h"
+
+#include <ostream>
+
+#include "base/logging.h"
+
+namespace subresource_filter {
+
+std::ostream& operator<<(std::ostream& os, const ActivationList& type) {
+  switch (type) {
+    case ActivationList::NONE:
+      os << "NONE";
+      break;
+    case ActivationList::SOCIAL_ENG_ADS_INTERSTITIAL:
+      os << "SOCIAL_ENG_ADS_INTERSTITIAL";
+      break;
+    case ActivationList::PHISHING_INTERSTITIAL:
+      os << "PHISHING_INTERSTITIAL";
+      break;
+    default:
+      NOTREACHED();
+      break;
+  }
+  return os;
+}
+
+}  // namespace subresource_filter