[WIP][NotForLand]: Use Mojo for WebMIDI IPC

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index 4a0e262f20ab0da5894751ff2575ede592fcef3f..24680dd8e62a277bb553ab35062c0abcbfc2eb32 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -144,6 +144,7 @@
 #include "ipc/mojo/ipc_channel_mojo.h"
 #include "ipc/mojo/ipc_channel_mojo_host.h"
 #include "media/base/media_switches.h"
+#include "media/midi/midi_service_impl.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "ppapi/shared_impl/ppapi_switches.h"
 #include "storage/browser/fileapi/sandbox_file_system_backend.h"
@@ -907,6 +908,11 @@ void RenderProcessHostImpl::RegisterMojoServices() {
       base::Bind(&PermissionServiceContext::CreateService,
                  base::Unretained(permission_service_context_.get())));
 
+  mojo_application_host_->service_registry()->AddService(
+      base::Bind(&media::MidiServiceImpl::Create,
+                 GetID(),
+                 BrowserMainLoop::GetInstance()->midi_manager()));
+
 #if defined(OS_ANDROID)
   ServiceRegistrarAndroid::RegisterProcessHostServices(
       mojo_application_host_->service_registry_android());