Skeleton of the Safe Browsing Subresource Filter.

components/subresource_filter/core/browser/subresource_filter_features.h

Index: components/subresource_filter/core/browser/subresource_filter_features.h
diff --git a/components/subresource_filter/core/browser/subresource_filter_features.h b/components/subresource_filter/core/browser/subresource_filter_features.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_SUBRESOURCE_FILTER_FEATURES_H_
+#define COMPONENTS_SUBRESOURCE_FILTER_SUBRESOURCE_FILTER_FEATURES_H_
+
+#include "base/feature_list.h"
+#include "components/subresource_filter/core/common/activation_state.h"
+
+namespace subresource_filter {
+
+// The master toggle to enable/disable the Safe Browsing Subresource Filter.
+extern const base::Feature kSafeBrowsingSubresourceFilter;
+
+// Name/values of the variation parameter controlling maximum activation state.
+extern const char kActivationStateParameterName[];
+extern const char kActivationStateDryRun[];
+extern const char kActivationStateEnabled[];
+
+// Returns the maximum degree to which subresource filtering should be activated
+// on any RenderFrame. This will be ActivationState::DISABLED unless the feature
+// is enabled and variation parameters prescribe a higher activation state.
+ActivationState GetMaximumActivationState();
+
+}  // namespace subresource_filter
+
+#endif  // COMPONENTS_SUBRESOURCE_FILTER_SUBRESOURCE_FILTER_FEATURES_H_