Add constructor taking group ID to MediaStreamDevice and StreamDeviceInfo

content/browser/renderer_host/media/video_capture_manager.cc

Index: content/browser/renderer_host/media/video_capture_manager.cc
diff --git a/content/browser/renderer_host/media/video_capture_manager.cc b/content/browser/renderer_host/media/video_capture_manager.cc
index 9c0f5fa3f9aa42b2859da2100074a423579a0e81..371e26b0c654e3c54b22d6ef9ac10e5e796de15e 100644
--- a/content/browser/renderer_host/media/video_capture_manager.cc
+++ b/content/browser/renderer_host/media/video_capture_manager.cc
@@ -978,6 +978,8 @@ void VideoCaptureManager::OnDevicesInfoEnumerated(
                          media::VideoCaptureFormats>>
       descriptors_and_formats;
   for (const auto& it : devices_info_cache_) {
+    // TODO(guidou): Implement group IDs for video capture devices.
+    // http://crbug.com/627793
     devices.emplace_back(stream_type, it.descriptor.GetNameAndModel(),
                          it.descriptor.device_id);
     descriptors_and_formats.emplace_back(it.descriptor, it.supported_formats);