Index: media/midi/midi_manager_usb.cc |
diff --git a/media/midi/midi_manager_usb.cc b/media/midi/midi_manager_usb.cc |
index f493b151c884e89cb4f09ab22bbf9781d0a63ae0..9e4778c3b39f7ae6126ab2572ec78a6574e50e48 100644 |
--- a/media/midi/midi_manager_usb.cc |
+++ b/media/midi/midi_manager_usb.cc |
@@ -137,7 +137,7 @@ bool MidiManagerUsb::AddPorts(UsbMidiDevice* device, int device_id) { |
// sufficiently unique although there is no user-friendly meaning. |
// TODO(yhirano): Use a hashed string as ID. |
std::string id( |
- base::StringPrintf("port-%d-%ld", device_id, static_cast<long>(j))); |
+ base::StringPrintf("usb:port-%d-%ld", device_id, static_cast<long>(j))); |
if (jacks[j].direction() == UsbMidiJack::DIRECTION_OUT) { |
output_streams_.push_back(new UsbMidiOutputStream(jacks[j])); |
AddOutputPort(MidiPortInfo(id, manufacturer, product_name, version, |