Componentize component_updater: Move some paths/constants to component.

components/component_updater/pref_names.cc

Index: components/component_updater/pref_names.cc
diff --git a/components/component_updater/pref_names.cc b/components/component_updater/pref_names.cc
new file mode 100644
index 0000000000000000000000000000000000000000..389100eedc6cd685e9aa7cb2ea9d933b5da914df
--- /dev/null
+++ b/components/component_updater/pref_names.cc
@@ -0,0 +1,13 @@
+// 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.
+
+#include "components/component_updater/pref_names.h"
+
+namespace prefs {
+
+// String that represents the recovery component last downloaded version. This
+// takes the usual 'a.b.c.d' notation.
+const char kRecoveryComponentVersion[] = "recovery_component.version";
+
+}  // namespace prefs