Cleanup chrome/browser/metrics url constants

chrome/browser/metrics/variations/url_constants.h

Index: chrome/browser/metrics/variations/url_constants.h
diff --git a/chrome/browser/metrics/variations/url_constants.h b/chrome/browser/metrics/variations/url_constants.h
new file mode 100644
index 0000000000000000000000000000000000000000..06543ff6552b4bba11894a9a84615053f2246d60
--- /dev/null
+++ b/chrome/browser/metrics/variations/url_constants.h
@@ -0,0 +1,14 @@
+// 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 CHROME_BROWSER_METRICS_VARIATIONS_URL_CONSTANTS_H_
+#define CHROME_BROWSER_METRICS_VARIATIONS_URL_CONSTANTS_H_
+
+namespace chrome_variations {
+
+extern const char kDefaultServerUrl[];
+
+}  // namespace chrome_variations
+
+#endif  // CHROME_BROWSER_METRICS_VARIATIONS_URL_CONSTANTS_H_