Skeleton of the Safe Browsing Subresource Filter.

components/subresource_filter/core/browser/subresource_filter_features_test_support.h

Index: components/subresource_filter/core/browser/subresource_filter_features_test_support.h
diff --git a/components/subresource_filter/core/browser/subresource_filter_features_test_support.h b/components/subresource_filter/core/browser/subresource_filter_features_test_support.h
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index 0000000000000000000000000000000000000000..0c301b9d4094686fc1f88747524e6673e21ca13d
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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_BROWSER_SUBRESOURCE_FILTER_FEATURES_TEST_SUPPORT_H_
+#define COMPONENTS_SUBRESOURCE_FILTER_CORE_BROWSER_SUBRESOURCE_FILTER_FEATURES_TEST_SUPPORT_H_
+
+#include <string>
+
+#include "base/feature_list.h"
+#include "base/macros.h"
+
+namespace subresource_filter {
+namespace testing {
+
+// Helper to override the state of the |kSafeBrowsingSubresourceFilter| feature
+// and the maximum activation state during tests. Expects a pre-existing global
+// base::FieldTrialList singleton.
+class ScopedSubresourceFilterFeatureToggle {
+ public:
+  ScopedSubresourceFilterFeatureToggle(
+      base::FeatureList::OverrideState feature_state,
+      const std::string& maximum_activation_state);
+  ~ScopedSubresourceFilterFeatureToggle();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ScopedSubresourceFilterFeatureToggle);
+};
+
+}  // namespace testing
+}  // namespace subresource_filter
+
+#endif  // COMPONENTS_SUBRESOURCE_FILTER_CORE_BROWSER_SUBRESOURCE_FILTER_FEATURES_TEST_SUPPORT_H_