Move test into test/std subdirectory.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@224658 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/utilities/time/clock.h

@@ -0,0 +1,26 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CLOCK_H
+#define CLOCK_H
+
+#include <chrono>
+
+class Clock
+{
+    typedef std::chrono::nanoseconds                 duration;
+    typedef duration::rep                            rep;
+    typedef duration::period                         period;
+    typedef std::chrono::time_point<Clock, duration> time_point;
+    static const bool is_steady =                    false;
+
+    static time_point now();
+};
+
+#endif  // CLOCK_H