Clean up some code in variations_util.
Shares HashName() implementation between multiple files.
Cleans up some unecessary namespaces.
BUG=none
TEST=existing unit tests
Review URL: https://chromiumcodereview.appspot.com/10920048
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@154989 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/common/metrics/metrics_util.h b/chrome/common/metrics/metrics_util.h
new file mode 100644
index 0000000..306ed09c
--- /dev/null
+++ b/chrome/common/metrics/metrics_util.h
@@ -0,0 +1,20 @@
+// Copyright (c) 2012 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_COMMON_METRICS_METRICS_UTIL_H_
+#define CHROME_COMMON_METRICS_METRICS_UTIL_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+
+namespace metrics {
+
+// Computes a uint32 hash of a given string based on its SHA1 hash. Suitable for
+// uniquely identifying field trial names and group names.
+uint32 HashName(const std::string& name);
+
+} // namespace metrics
+
+#endif // CHROME_COMMON_METRICS_METRICS_UTIL_H_
