Revert of Change VideoCaptureDeliverFrameCB's signature

content/renderer/media/media_stream_video_capture_source_unittest.cc

Index: content/renderer/media/media_stream_video_capture_source_unittest.cc
diff --git a/content/renderer/media/media_stream_video_capture_source_unittest.cc b/content/renderer/media/media_stream_video_capture_source_unittest.cc
index a8591359e41c9e688bf629bae0bab0c3c057ca8f..3efc0cb969ac4dc8656f47d6779d0bedd1da2b93 100644
--- a/content/renderer/media/media_stream_video_capture_source_unittest.cc
+++ b/content/renderer/media/media_stream_video_capture_source_unittest.cc
@@ -265,7 +265,7 @@
   }
 
   void OnVideoFrame(const scoped_refptr<media::VideoFrame>& frame,
-                    base::TimeTicks capture_time) {
+                    const base::TimeTicks& capture_time) {
     *capture_time_ = capture_time;
     metadata_->Clear();
     base::DictionaryValue tmp;