Mac VideoCapture: return empty GetModel() for non-USB non-built-in cameras.

media/video/capture/mac/video_capture_device_factory_mac.mm

Index: media/video/capture/mac/video_capture_device_factory_mac.mm
diff --git a/media/video/capture/mac/video_capture_device_factory_mac.mm b/media/video/capture/mac/video_capture_device_factory_mac.mm
index d58a25c658687e18ee8261874b4a8076b50f4c1e..6f2437db1a1bd4fc52c94381ef8d5d6a4ed2431e 100644
--- a/media/video/capture/mac/video_capture_device_factory_mac.mm
+++ b/media/video/capture/mac/video_capture_device_factory_mac.mm
@@ -4,6 +4,8 @@
 
 #include "media/video/capture/mac/video_capture_device_factory_mac.h"
 
+#import <IOKit/audio/IOAudioTypes.h>
+
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/task_runner_util.h"
@@ -34,7 +36,7 @@ EnumerateDevicesUsingQTKit() {
   [VideoCaptureDeviceQTKit getDeviceNames:capture_devices];
   for (NSString* key in capture_devices) {
     VideoCaptureDevice::Name name(
-        [[capture_devices valueForKey:key] UTF8String],
+        [[[capture_devices valueForKey:key] deviceName] UTF8String],
         [key UTF8String], VideoCaptureDevice::Name::QTKIT);
     device_names->push_back(name);
   }
@@ -106,9 +108,17 @@ void VideoCaptureDeviceFactoryMac::GetDeviceNames(
     // Enumerate all devices found by AVFoundation, translate the info for each
     // to class Name and add it to |device_names|.
     for (NSString* key in capture_devices) {
+      int transport_type = [[capture_devices valueForKey:key] transportType];
+      // Transport types are defined for Audio devices and reused for video.
+      VideoCaptureDevice::Name::TransportType device_transport_type =
+          (transport_type == kIOAudioDeviceTransportTypeBuiltIn ||
+          transport_type == kIOAudioDeviceTransportTypeUSB) ?
+          VideoCaptureDevice::Name::USB_OR_BUILT_IN :
+          VideoCaptureDevice::Name::OTHER_TRANSPORT;
       VideoCaptureDevice::Name name(
-          [[capture_devices valueForKey:key] UTF8String],
-          [key UTF8String], VideoCaptureDevice::Name::AVFOUNDATION);
+          [[[capture_devices valueForKey:key] deviceName] UTF8String],
+          [key UTF8String], VideoCaptureDevice::Name::AVFOUNDATION,
+          device_transport_type);
       device_names->push_back(name);
       // Extract the device's Vendor ID and compare to all blacklisted ones.
       device_vid = name.GetModel().substr(0, kVidPidSize);
@@ -126,7 +136,7 @@ void VideoCaptureDeviceFactoryMac::GetDeviceNames(
     if (is_any_device_blacklisted) {
       capture_devices = [VideoCaptureDeviceQTKit deviceNames];
       for (NSString* key in capture_devices) {
-        NSString* device_name = [capture_devices valueForKey:key];
+        NSString* device_name = [[capture_devices valueForKey:key] deviceName];
         for (size_t i = 0; i < arraysize(kBlacklistedCameras); ++i) {
           if ([device_name rangeOfString:@(kBlacklistedCameras[i].name)
                                  options:NSCaseInsensitiveSearch].length != 0) {