Reland "Add hugeFramesSent GetStats metric"

This is a reland of f9f71b91ae073fdd2b89ff9df1204835aa3137eb
after the change in chromium tests.

Chromium change done here:
https://chromium-review.googlesource.com/c/chromium/src/+/950776

Original reviewed on: https://webrtc-review.googlesource.com/c/src/+/54420

No changes to the original patchset were done.

TBR=hta@webrtc.org,hbos@webrtc.org,sprang@webrtc.org,solenberg@webrtc.org

Bug: webrtc:8901
Change-Id: Ic88c3cb963dceea0426eb90519743e3c1a4533c1
Reviewed-on: https://webrtc-review.googlesource.com/60140
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22310}
diff --git a/media/base/mediachannel.h b/media/base/mediachannel.h
index a5831ff..90fa40c 100644
--- a/media/base/mediachannel.h
+++ b/media/base/mediachannel.h
@@ -466,6 +466,8 @@
   bool has_entered_low_resolution = false;
   rtc::Optional<uint64_t> qp_sum;
   webrtc::VideoContentType content_type = webrtc::VideoContentType::UNSPECIFIED;
+  // https://w3c.github.io/webrtc-stats/#dom-rtcvideosenderstats-hugeframessent
+  uint32_t huge_frames_sent = 0;
 };
 
 struct VideoReceiverInfo : public MediaReceiverInfo {