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

media/video/capture/mac/video_capture_device_qtkit_mac.mm

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "media/video/capture/mac/video_capture_device_qtkit_mac.h"
 
 #import <QTKit/QTKit.h>
 
 #include "base/debug/crash_logging.h"
 #include "base/logging.h"
@@ skipping 11 matching lines @@
   // Third-party drivers often throw exceptions, which are fatal in
   // Chromium (see comments in scoped_nsexception_enabler.h).  The
   // following catches any exceptions and continues in an orderly
   // fashion with no devices detected.
   NSArray* captureDevices =
       base::mac::RunBlockIgnoringExceptions(^{
           return [QTCaptureDevice inputDevicesWithMediaType:QTMediaTypeVideo];
       });
 
   for (QTCaptureDevice* device in captureDevices) {
-    if (![[device attributeForKey:QTCaptureDeviceSuspendedAttribute] boolValue])
-      [deviceNames setObject:[device localizedDisplayName]
-                      forKey:[device uniqueID]];
+    if ([[device attributeForKey:QTCaptureDeviceSuspendedAttribute] boolValue])
+      continue;
+    DeviceNameAndTransportType* nameAndTransportType =
+        [[[DeviceNameAndTransportType alloc]
+             initWithName:[device localizedDisplayName]
+            transportType:media::kIOAudioDeviceTransportTypeUnknown]
+            autorelease];
+    [deviceNames setObject:nameAndTransportType
+                    forKey:[device uniqueID]];
   }
 }
 
 + (NSDictionary*)deviceNames {
   NSMutableDictionary* deviceNames =
       [[[NSMutableDictionary alloc] init] autorelease];
 
   // TODO(shess): Post to the main thread to see if that helps
   // http://crbug.com/139164
   [self performSelectorOnMainThread:@selector(getDeviceNames:)
@@ skipping 286 matching lines @@
 
 - (void)sendErrorString:(NSString*)error {
   DLOG(ERROR) << [error UTF8String];
   [lock_ lock];
   if (frameReceiver_)
     frameReceiver_->ReceiveError([error UTF8String]);
   [lock_ unlock];
 }
 
 @end