Mojom updates for Motown.

mojo/services/media/common/interfaces/media_clock.mojom

+// 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.
+
+[DartPackage="mojo_services"]
+module mojo.media;
+
+// Expresses a component's disposition with respect to being a clock master or
+// slave.
+enum ClockDisposition {
+  // Clocks are irrelevant. Component will produce/consume on demand.
+  PASSIVE,
+
+  // Component must slave to a master clock.
+  SLAVE,
+
+  // Component can be master or slave, but being slave is preferred.
+  PREFER_SLAVE,
+
+  // Component can be master or slave, doesn't care which.
+  INDIFFERENT,
+
+  // Component can be master or slave, but master is preferred.
+  PREFER_MASTER,
+
+  // Component must be master and cannot slave to a master clock.
+  MASTER
+};
+
+interface Clock {
+  // TODO(dalesat): Define this.
+};