Skeleton of the Safe Browsing Subresource Filter.

components/subresource_filter/core/common/activation_state.h

Index: components/subresource_filter/core/common/activation_state.h
diff --git a/components/subresource_filter/core/common/activation_state.h b/components/subresource_filter/core/common/activation_state.h
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+// 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.
+
+#ifndef COMPONENTS_SUBRESOURCE_FILTER_CORE_COMMON_ACTIVATION_STATE_H_
+#define COMPONENTS_SUBRESOURCE_FILTER_CORE_COMMON_ACTIVATION_STATE_H_
+
+#include <iosfwd>
+
+namespace subresource_filter {
+
+// Degrees to which the subresource filtering mechanism can be activated.
+enum class ActivationState {
+  DISABLED,
+  // Subresource loads are matched against filtering rules, but all loads are
+  // allowed to proceed regardless. Used for stability and performance testing.
+  DRYRUN,
+  ENABLED,
+  LAST = ENABLED
+};
+
+// For logging use only.
+std::ostream& operator<<(std::ostream& os, const ActivationState& state);
+
+}  // namespace subresource_filter
+
+#endif  // COMPONENTS_SUBRESOURCE_FILTER_CORE_COMMON_ACTIVATION_STATE_H_