RESOURCE_UTILIZATION in VideoFrameMetadata, a consumer feedback signal.

content/browser/renderer_host/media/video_capture_controller.h

Index: content/browser/renderer_host/media/video_capture_controller.h
diff --git a/content/browser/renderer_host/media/video_capture_controller.h b/content/browser/renderer_host/media/video_capture_controller.h
index 0dd86842f6f91520b23b6671ec5ad8192f9f28d2..568913646c31abf947ee3a470396e96bc700802e 100644
--- a/content/browser/renderer_host/media/video_capture_controller.h
+++ b/content/browser/renderer_host/media/video_capture_controller.h
@@ -108,11 +108,13 @@ class CONTENT_EXPORT VideoCaptureController {
   // VideoCaptureControllerEventHandler::OnBufferReady. In the case that the
   // buffer was backed by a texture, |sync_point| will be waited on before
   // destroying or recycling the texture, to synchronize with texture users in
-  // the renderer process.
+  // the renderer process. If the consumer provided stress level feedback, this
+  // will be passed here (-1.0 indicates no feedback).
   void ReturnBuffer(VideoCaptureControllerID id,
                     VideoCaptureControllerEventHandler* event_handler,
                     int buffer_id,
-                    uint32 sync_point);
+                    uint32 sync_point,
+                    double consumer_stress_level);
 
   const media::VideoCaptureFormat& GetVideoCaptureFormat() const;