Chromecast: communicate HDMI-sink codec changes over IPC.

chromecast/common/media/cast_message_generator.cc

Index: chromecast/common/media/cast_message_generator.cc
diff --git a/chromecast/common/media/cast_message_generator.cc b/chromecast/common/media/cast_message_generator.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ee6c73e2de9ae33476f4ac4b2f81a8508ae5f680
--- /dev/null
+++ b/chromecast/common/media/cast_message_generator.cc
@@ -0,0 +1,15 @@
+// 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.
+
+// Get basic type definitions.
+#define IPC_MESSAGE_IMPL
+#include "chromecast/common/media/cast_message_generator.h"
+
+// Generate constructors.
+#include "ipc/struct_constructor_macros.h"
+#include "chromecast/common/media/cast_message_generator.h"
+
+// Generate destructors.
+#include "ipc/struct_destructor_macros.h"
+#include "chromecast/common/media/cast_message_generator.h"