Web MIDI: make MidiManagerMac notify device connections

content/browser/media/midi_host.cc

 // Copyright (c) 2013 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.
 
 #include "content/browser/media/midi_host.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/process/process.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 127 matching lines @@
   base::AutoLock auto_lock(messages_queues_lock_);
   // MidiMessageQueue is created later in ReceiveMidiData().
   received_messages_queues_.push_back(nullptr);
   Send(new MidiMsg_AddInputPort(info));
 }
 
 void MidiHost::AddOutputPort(const media::MidiPortInfo& info) {
   Send(new MidiMsg_AddOutputPort(info));
 }
 
+void MidiHost::SetInputPortState(uint32 port, media::MidiPortState state) {
+  Send(new MidiMsg_SetInputPortState(port, state));
+}
+
+void MidiHost::SetOutputPortState(uint32 port, media::MidiPortState state) {
+  Send(new MidiMsg_SetOutputPortState(port, state));
+}
+
 void MidiHost::ReceiveMidiData(
     uint32 port,
     const uint8* data,
     size_t length,
     double timestamp) {
   TRACE_EVENT0("midi", "MidiHost::ReceiveMidiData");
 
   base::AutoLock auto_lock(messages_queues_lock_);
   if (received_messages_queues_.size() <= port)
     return;
@@ skipping 66 matching lines @@
     }
     waiting_data_length = media::GetMidiMessageLength(current);
     if (waiting_data_length == 0)
       return false;  // Error: |current| should have been a valid status byte.
     --waiting_data_length;  // Found status byte
   }
   return waiting_data_length == 0 && !in_sysex;
 }
 
 }  // namespace content