Add flags and experiment config for selecting triggering heuristics

components/dom_distiller/core/experiments.h

Index: components/dom_distiller/core/experiments.h
diff --git a/components/dom_distiller/core/experiments.h b/components/dom_distiller/core/experiments.h
new file mode 100644
index 0000000000000000000000000000000000000000..7f1f350f77621c932426b068f9f277383d19de89
--- /dev/null
+++ b/components/dom_distiller/core/experiments.h
@@ -0,0 +1,18 @@
+// Copyright 2015 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_DOM_DISTILLER_CORE_EXPERIMENTS_H_
+#define COMPONENTS_DOM_DISTILLER_CORE_EXPERIMENTS_H_
+
+namespace dom_distiller {
+  enum class DistillerHeuristicsType {
+    NONE,
+    OG_ARTICLE,
+    ADABOOST_MODEL,
+  };
+
+  DistillerHeuristicsType GetDistillerHeuristicsType();
+}
+
+#endif  // COMPONENTS_DOM_DISTILLER_CORE_EXPERIMENTS_H_