services/ui: Get rid of IPC::ChannelHandle type converter

services/ui/gpu/gpu_service_impl.cc

Index: services/ui/gpu/gpu_service_impl.cc
diff --git a/services/ui/gpu/gpu_service_impl.cc b/services/ui/gpu/gpu_service_impl.cc
index f0e6013217e9cfce2a69e4126ecdd3117dd32999..5830c41d538ec227ea0463ed1934dc40cbddaba0 100644
--- a/services/ui/gpu/gpu_service_impl.cc
+++ b/services/ui/gpu/gpu_service_impl.cc
@@ -15,9 +15,13 @@ namespace {
 void EstablishGpuChannelDone(
     const mojom::GpuService::EstablishGpuChannelCallback& callback,
     int32_t client_id,
-    const IPC::ChannelHandle& channel_handle) {
+    IPC::ChannelHandle* channel_handle) {
   // TODO(penghuang): Send the real GPUInfo to the client.
-  callback.Run(client_id, mojom::ChannelHandle::From(channel_handle),
+  mojo::MessagePipeHandle handle;
+  if (channel_handle)
+    handle = channel_handle->mojo_handle;
+  callback.Run(client_id,
+               mojo::ScopedMessagePipeHandle(handle),
                gpu::GPUInfo());
 }
 }