RESOURCE_UTILIZATION in VideoFrameMetadata, a consumer feedback signal.

content/browser/media/capture/content_video_capture_device_core.h

Index: content/browser/media/capture/content_video_capture_device_core.h
diff --git a/content/browser/media/capture/content_video_capture_device_core.h b/content/browser/media/capture/content_video_capture_device_core.h
index 50600cf42998aa12225be2c7df78e2a907e03193..5a928a50133b77ccfd16e03aefa4ccf9f79a22e1 100644
--- a/content/browser/media/capture/content_video_capture_device_core.h
+++ b/content/browser/media/capture/content_video_capture_device_core.h
@@ -85,6 +85,11 @@ class ThreadSafeCaptureOracle
       base::TimeTicks timestamp,
       bool success);
 
+  // Callback invoked once all consumers have finished with a delivered video
+  // frame.  Consumer feedback signals are scanned from the frame's |metadata|.
+  void DidConsumeFrame(int frame_number,
+                       const media::VideoFrameMetadata* metadata);
+
   // Protects everything below it.
   mutable base::Lock lock_;