Pass implementation object to supplemental classes by reference

Source/modules/mediasource/HTMLVideoElementMediaSource.cpp

Index: Source/modules/mediasource/HTMLVideoElementMediaSource.cpp
diff --git a/Source/modules/mediasource/HTMLVideoElementMediaSource.cpp b/Source/modules/mediasource/HTMLVideoElementMediaSource.cpp
index efb416e0ced33c87b06ff8a804e1d3c5650759de..a4c65a2c0605040e7ddd0862bbf361916e3c1285 100644
--- a/Source/modules/mediasource/HTMLVideoElementMediaSource.cpp
+++ b/Source/modules/mediasource/HTMLVideoElementMediaSource.cpp
@@ -40,19 +40,19 @@ HTMLVideoElementMediaSource::HTMLVideoElementMediaSource() { }
 
 HTMLVideoElementMediaSource::~HTMLVideoElementMediaSource() { }
 
-PassRefPtrWillBeRawPtr<VideoPlaybackQuality> HTMLVideoElementMediaSource::getVideoPlaybackQuality(HTMLVideoElement* videoElement)
+PassRefPtrWillBeRawPtr<VideoPlaybackQuality> HTMLVideoElementMediaSource::getVideoPlaybackQuality(HTMLVideoElement& videoElement)
 {
     unsigned total = 0;
     unsigned dropped = 0;
     unsigned corrupted = 0;
-    MediaPlayer* player = videoElement->player();
+    MediaPlayer* player = videoElement.player();
     if (player) {
         total = player->decodedFrameCount();
         dropped = player->droppedFrameCount();
         corrupted = player->corruptedFrameCount();
     }
 
-    return VideoPlaybackQuality::create(videoElement->document(), total, dropped, corrupted);
+    return VideoPlaybackQuality::create(videoElement.document(), total, dropped, corrupted);
 }
 
 }