Web MIDI: make MidiManagerMac notify device connections

media/midi/midi_manager.cc

Index: media/midi/midi_manager.cc
diff --git a/media/midi/midi_manager.cc b/media/midi/midi_manager.cc
index 9e1f1e270d38f81ae85b5caf03e6675420749694..f7de36f2ac50d2a73c8d63a65129806b6d17ba23 100644
--- a/media/midi/midi_manager.cc
+++ b/media/midi/midi_manager.cc
@@ -130,6 +130,22 @@ void MidiManager::AddOutputPort(const MidiPortInfo& info) {
     client->AddOutputPort(info);
 }
 
+void MidiManager::SetInputPortState(uint32 port_index, MidiPortState state) {
+  base::AutoLock auto_lock(lock_);
+  DCHECK_LT(port_index, input_ports_.size());
+  input_ports_[port_index].state = state;
+  for (auto client : clients_)
+    client->SetInputPortState(port_index, state);
+}
+
+void MidiManager::SetOutputPortState(uint32 port_index, MidiPortState state) {
+  base::AutoLock auto_lock(lock_);
+  DCHECK_LT(port_index, output_ports_.size());
+  output_ports_[port_index].state = state;
+  for (auto client : clients_)
+    client->SetOutputPortState(port_index, state);
+}
+
 void MidiManager::ReceiveMidiData(
     uint32 port_index,
     const uint8* data,