Web MIDI: distributes MIDIPort information asynchronously

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 4a52ca6910c4a783440adb678658bd78ab018aea..8662adb5a997778e3c06c84258c704ec56979ca9 100644
--- a/media/midi/midi_manager_unittest.cc
+++ b/media/midi/midi_manager_unittest.cc
@@ -60,6 +60,9 @@ class FakeMidiManagerClient : public MidiManagerClient {
   ~FakeMidiManagerClient() override {}
 
   // MidiManagerClient implementation.
+  void AddInputPort(const MidiPortInfo& info) override {}
+  void AddOutputPort(const MidiPortInfo& info) override {}
+
   void CompleteStartSession(MidiResult result) override {
     EXPECT_TRUE(wait_for_result_);
     result_ = result;