Add flags and experiment config for selecting triggering heuristics

components/dom_distiller/core/dom_distiller_switches.h

Index: components/dom_distiller/core/dom_distiller_switches.h
diff --git a/components/dom_distiller/core/dom_distiller_switches.h b/components/dom_distiller/core/dom_distiller_switches.h
new file mode 100644
index 0000000000000000000000000000000000000000..fa632b6468326d4573d5452680f659865ebdc68e
--- /dev/null
+++ b/components/dom_distiller/core/dom_distiller_switches.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_DOM_DISTILLER_SWITCHES_H_
+#define COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_SWITCHES_H_
+
+#include "base/base_switches.h"
+#include "base/command_line.h"
+
+namespace switches {
+
+extern const char kEnableReaderModeOGArticleHeuristics[];
+extern const char kEnableReaderModeAdaBoostHeuristics[];
+
+};
+
+#endif  // COMPONENTS_DOM_DISTILLER_CORE_DOM_DISTILLER_SWITCHES_H_