Use kMIDIPropertyDisplayName instead of kMIDIPropertyName

From the documentation:
"Provides the Apple-recommended user-visible name for an endpoint, by combining the device and endpoint names."

This fixes the problem of port names of "Out Port 1", "Out Port 2" without a sense of the device it belongs to.

Review URL: https://codereview.chromium.org/1025903003

Cr-Commit-Position: refs/heads/master@{#321974}

media/midi/midi_manager_mac.cc

@@ -51,11 +51,13 @@ MidiPortInfo GetPortInfoFromEndpoint(MIDIEndpointRef endpoint) {
 
   string name;
   CFStringRef name_ref = NULL;
-  result = MIDIObjectGetStringProperty(endpoint, kMIDIPropertyName, &name_ref);
+  result = MIDIObjectGetStringProperty(endpoint, kMIDIPropertyDisplayName,
+                                       &name_ref);
   if (result == noErr)
     name = SysCFStringRefToUTF8(name_ref);
   else
-    DLOG(WARNING) << "Failed to get kMIDIPropertyName with status " << result;
+    DLOG(WARNING) << "Failed to get kMIDIPropertyDisplayName with status "
+                  << result;
 
   string version;
   SInt32 version_number = 0;