Added experiments section and exported the list of SafeBrowsing features in WebUI

components/safe_browsing/features.h

Index: components/safe_browsing/features.h
diff --git a/components/safe_browsing/features.h b/components/safe_browsing/features.h
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+// Copyright (c) 2017 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_SAFE_BROWSING_FEATURES_H_
+#define COMPONENTS_SAFE_BROWSING_FEATURES_H_
+
+#include <stddef.h>
+#include <algorithm>
+#include <utility>
+#include <vector>
+
+#include "base/feature_list.h"
+#include "base/macros.h"
+#include "base/values.h"
+namespace base {
+class ListValue;
+}  // namespace base
+
+namespace safe_browsing {
+// Features list
+extern const base::Feature kLocalDatabaseManagerEnabled;
+extern const base::Feature kV4OnlyEnabled;
+extern const base::Feature kThreatDomDetailsTagAndAttributeFeature;
+
+base::ListValue GetFeatureStatusList();
+
+#endif  // COMPONENTS_SAFE_BROWSING_FEATURES_H_
+}  // namespace safe_browsing