Web MIDI: make MidiManagerMac notify device connections

media/midi/midi_manager_unittest.cc

Index: media/midi/midi_manager_unittest.cc
diff --git a/media/midi/midi_manager_unittest.cc b/media/midi/midi_manager_unittest.cc
index 40d9152b712daa1b69003c2c81275c4594897a0e..680f9db5bd1882a9aea86863cbc89875bbfe5192 100644
--- a/media/midi/midi_manager_unittest.cc
+++ b/media/midi/midi_manager_unittest.cc
@@ -62,6 +62,8 @@ class FakeMidiManagerClient : public MidiManagerClient {
   // MidiManagerClient implementation.
   void AddInputPort(const MidiPortInfo& info) override {}
   void AddOutputPort(const MidiPortInfo& info) override {}
+  void SetInputPortState(uint32 port_index, MidiPortState state) override {}
+  void SetOutputPortState(uint32 port_index, MidiPortState state) override {}
 
   void CompleteStartSession(MidiResult result) override {
     EXPECT_TRUE(wait_for_result_);