Convert MIDI permission requests to use WebContents in preparation for switching the code to using …

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 887c194a69b1268e0eb6af3992789841f4032719..403f885d8cdca3631c9547ec1820224af1e29855 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -64,6 +64,7 @@
 #include "content/browser/loader/resource_scheduler_filter.h"
 #include "content/browser/media/capture/audio_mirroring_manager.h"
 #include "content/browser/media/media_internals.h"
+#include "content/browser/media/midi_host.h"
 #include "content/browser/message_port_message_filter.h"
 #include "content/browser/mime_registry_message_filter.h"
 #include "content/browser/mojo/mojo_application_host.h"
@@ -80,8 +81,6 @@
 #include "content/browser/renderer_host/media/audio_renderer_host.h"
 #include "content/browser/renderer_host/media/device_request_message_filter.h"
 #include "content/browser/renderer_host/media/media_stream_dispatcher_host.h"
-#include "content/browser/renderer_host/media/midi_dispatcher_host.h"
-#include "content/browser/renderer_host/media/midi_host.h"
 #include "content/browser/renderer_host/media/peer_connection_tracker_host.h"
 #include "content/browser/renderer_host/media/video_capture_host.h"
 #include "content/browser/renderer_host/memory_benchmark_message_filter.h"
@@ -741,7 +740,6 @@ void RenderProcessHostImpl::CreateMessageFilters() {
   AddFilter(audio_renderer_host_);
   AddFilter(
       new MidiHost(GetID(), BrowserMainLoop::GetInstance()->midi_manager()));
-  AddFilter(new MidiDispatcherHost(GetID(), browser_context));
   AddFilter(new VideoCaptureHost(media_stream_manager));
   AddFilter(new AppCacheDispatcherHost(
       storage_partition_impl_->GetAppCacheService(),