Add mus::mojom::ChannelHandle for passing IPC::ChannelHandle via mojo IPC.

components/mus/gpu/gpu_type_converters.h

Index: components/mus/gpu/gpu_type_converters.h
diff --git a/components/mus/gpu/gpu_type_converters.h b/components/mus/gpu/gpu_type_converters.h
new file mode 100644
index 0000000000000000000000000000000000000000..6de95fd7c1a46fa8bc4b4287c9a2ac8ee9cef48c
--- /dev/null
+++ b/components/mus/gpu/gpu_type_converters.h
@@ -0,0 +1,29 @@
+// Copyright 2016 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 COMPONENTS_MUS_GPU_GPU_TYPE_CONVERTERS_H_
+#define COMPONENTS_MUS_GPU_GPU_TYPE_CONVERTERS_H_
+
+#include "components/mus/public/interfaces/channel_handle.mojom.h"
+#include "mojo/public/cpp/bindings/type_converter.h"
+
+namespace IPC {
+struct ChannelHandle;
+}
+
+namespace mojo {
+
+template <>
+struct TypeConverter<mus::mojom::ChannelHandlePtr, IPC::ChannelHandle> {
+  static mus::mojom::ChannelHandlePtr Convert(const IPC::ChannelHandle& handle);
+};
+
+template <>
+struct TypeConverter<IPC::ChannelHandle, mus::mojom::ChannelHandlePtr> {
+  static IPC::ChannelHandle Convert(const mus::mojom::ChannelHandlePtr& handle);
+};
+
+}  // namespace mojo
+
+#endif  // COMPONENTS_MUS_GPU_GPU_TYPE_CONVERTERS_H_