Monitor the intersection of video and viewport.

media/blink/webmediaplayer_impl.cc

Index: media/blink/webmediaplayer_impl.cc
diff --git a/media/blink/webmediaplayer_impl.cc b/media/blink/webmediaplayer_impl.cc
index 3e1500e121bab874f209093e74cb36922672fd20..3ffe4b4b449aeda4e186ef19c93ce8b1029470bb 100644
--- a/media/blink/webmediaplayer_impl.cc
+++ b/media/blink/webmediaplayer_impl.cc
@@ -352,6 +352,11 @@ void WebMediaPlayerImpl::exitedFullscreen() {
     observer_->OnExitedFullscreen();
 }
 
+void WebMediaPlayerImpl::videoViewportRatioChanged(double ratio) {
+  if (observer_)
+    observer_->OnVideoViewportRatioChanged(ratio);
+}
+
 void WebMediaPlayerImpl::DoLoad(LoadType load_type,
                                 const blink::WebURL& url,
                                 CORSMode cors_mode) {