Add a simple scheduler for animation frames

mc/scheduler/time_interval.h

+// 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.
+
+#ifndef MC_SCHEDULER_TIME_INTERVAL_H_
+#define MC_SCHEDULER_TIME_INTERVAL_H_
+
+#include "base/time/time.h"
+
+namespace mc {
+
+struct TimeInterval {
+  TimeInterval() {}
+  TimeInterval(base::TimeTicks base, base::TimeDelta duration)
+      : base(base), duration(duration) {}
+
+  base::TimeTicks NextAfter(base::TimeTicks when);
+
+  base::TimeTicks base;
+  base::TimeDelta duration;
+};
+}
+
+#endif  // MC_SCHEDULER_TIME_INTERVAL_H_