Bring up of the enhanced bookmarks cluster service.

components/enhanced_bookmarks/pref_names.h

Index: components/enhanced_bookmarks/pref_names.h
diff --git a/components/enhanced_bookmarks/pref_names.h b/components/enhanced_bookmarks/pref_names.h
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index 0000000000000000000000000000000000000000..a063d7e908da614682b1926979012279626e31db
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+++ b/components/enhanced_bookmarks/pref_names.h
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+// Copyright 2014 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_ENHANCED_BOOKMARKS_PREF_NAMES_H_
+#define COMPONENTS_ENHANCED_BOOKMARKS_PREF_NAMES_H_
+
+#include "build/build_config.h"
+
+namespace enhanced_bookmarks {
+namespace prefs {
+
+// Stores the last retrieved bookmark clusters from the server.
+extern const char kBookmarkClusters[];
+
+}  // namespace prefs
+}  // namespace enhanced_bookmarks
+
+#endif  // COMPONENTS_ENHANCED_BOOKMARKS_PREF_NAMES_H_