Add constructors and operators to MediaDeviceInfo.

content/browser/renderer_host/media/media_devices_manager.cc

Index: content/browser/renderer_host/media/media_devices_manager.cc
diff --git a/content/browser/renderer_host/media/media_devices_manager.cc b/content/browser/renderer_host/media/media_devices_manager.cc
index ccc3b4d4e2ea3f5bbf0e3f6a0865f14bf1f71bf8..e8d7f7de3f06b7cc7a147ad292cf6559be1c0072 100644
--- a/content/browser/renderer_host/media/media_devices_manager.cc
+++ b/content/browser/renderer_host/media/media_devices_manager.cc
@@ -385,8 +385,7 @@ void MediaDevicesManager::VideoInputDevicesEnumerated(
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   MediaDeviceInfoArray snapshot;
   for (const auto& descriptor : descriptors) {
-    snapshot.emplace_back(descriptor.device_id, descriptor.GetNameAndModel(),
-                          std::string());
+    snapshot.emplace_back(descriptor);
   }
   DevicesEnumerated(MEDIA_DEVICE_TYPE_VIDEO_INPUT, snapshot);
 }