Componentize kExperimentLabelSeparator & BuildExperimentDateString.

components/variations/variations_experiment_util.h

Index: components/variations/variations_experiment_util.h
diff --git a/components/variations/variations_experiment_util.h b/components/variations/variations_experiment_util.h
new file mode 100644
index 0000000000000000000000000000000000000000..c9c23f4006ba880406a68fb6797a51457017bd2f
--- /dev/null
+++ b/components/variations/variations_experiment_util.h
@@ -0,0 +1,25 @@
+// Copyright 2013 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_VARIATIONS_VARIATIONS_EXPERIMENT_UTIL_H_
+#define COMPONENTS_VARIATIONS_VARIATIONS_EXPERIMENT_UTIL_H_
+
+#include "base/strings/string16.h"
+
+namespace base {
+class Time;
+}
+
+namespace variations {
+
+// The separator used to separate items in experiment labels.
+extern const base::char16 kExperimentLabelSeparator;
+
+// Constructs a date string in the format understood by Google Update for the
+// |current_time| plus one year.
+base::string16 BuildExperimentDateString(const base::Time& current_time);
+
+}  // namespace variations
+
+#endif  // COMPONENTS_VARIATIONS_VARIATIONS_EXPERIMENT_UTIL_H_