Update mojo sdk to rev bdbb0c7e396fc4044a8b194058d7a7e529715286

third_party/mojo/src/mojo/edk/system/channel_id.h

Index: third_party/mojo/src/mojo/edk/system/channel_id.h
diff --git a/third_party/mojo/src/mojo/edk/system/channel_id.h b/third_party/mojo/src/mojo/edk/system/channel_id.h
new file mode 100644
index 0000000000000000000000000000000000000000..d410311b78ca07c2a1ac33634a6c9c76f2dfaa2d
--- /dev/null
+++ b/third_party/mojo/src/mojo/edk/system/channel_id.h
@@ -0,0 +1,23 @@
+// 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 MOJO_EDK_SYSTEM_CHANNEL_ID_H_
+#define MOJO_EDK_SYSTEM_CHANNEL_ID_H_
+
+#include <stdint.h>
+
+namespace mojo {
+namespace system {
+
+// IDs for |Channel|s managed by a |ChannelManager|. (IDs should be thought of
+// as specific to a given |ChannelManager|.)
+using ChannelId = uint64_t;
+
+// 0 is never a valid |ChannelId|.
+const ChannelId kInvalidChannelId = 0;
+
+}  // namespace system
+}  // namespace mojo
+
+#endif  // MOJO_EDK_SYSTEM_CHANNEL_ID_H_