Package video capture skeleton as Mojo Shell Service

services/video_capture/public/interfaces/video_capture_device.mojom

Index: services/video_capture/public/interfaces/video_capture_device.mojom
diff --git a/services/video_capture/public/interfaces/video_capture_device.mojom b/services/video_capture/public/interfaces/video_capture_device.mojom
index be3b97d7f1fc1fb9279eb550de261fd891f73fd5..ab6ff330c03891ad61f54aaf2c3b2f09045123b2 100644
--- a/services/video_capture/public/interfaces/video_capture_device.mojom
+++ b/services/video_capture/public/interfaces/video_capture_device.mojom
@@ -19,8 +19,9 @@ enum PowerLineFrequency {
   HZ_60
 };
 
-// Note: The VideoCaptureDevice is stopped when the corresponding message pipe
-// is closed.
+// Represents access to a video capture device available on the machine.
+// Note: Instead of offering an explicit Stop() method, the VideoCaptureDevice
+// is stopped automatically when the corresponding message pipe is closed.
 interface VideoCaptureDevice {
   Start(VideoCaptureFormat requested_format,
         ResolutionChangePolicy resolution_change_policy,