Skeleton of the Safe Browsing Subresource Filter.

components/subresource_filter/core/common/activation_state.cc

+// 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_state.h"
+
+#include <ostream>
+
+#include "base/logging.h"
+
+namespace subresource_filter {
+
+std::ostream& operator<<(std::ostream& os, const ActivationState& state) {
+  switch (state) {
+    case ActivationState::DISABLED:
+      os << "DISABLED";
+      break;
+    case ActivationState::DRYRUN:
+      os << "DRYRUN";
+      break;
+    case ActivationState::ENABLED:
+      os << "ENABLED";
+      break;
+    default:
+      NOTREACHED();
+      break;
+  }
+  return os;
+}
+
+}  // namespace subresource_filter