Get attributes based on kind instead of explictly pass them

Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>

src/utils/webrtc/analyzers/PeerConnectionAnalyzer.js

@@ -524,14 +524,18 @@ PeerConnectionAnalyzer.prototype = {
 	},
 
 	_calculateConnectionQualityAudio() {
-		return this._calculateConnectionQuality(this._packetsLostRatio.audio, this._packetsPerSecond.audio, this._roundTripTime.audio, 'audio')
+		return this._calculateConnectionQuality('audio')
 	},
 
 	_calculateConnectionQualityVideo() {
-		return this._calculateConnectionQuality(this._packetsLostRatio.video, this._packetsPerSecond.video, this._roundTripTime.video, 'video')
+		return this._calculateConnectionQuality('video')
 	},
 
-	_calculateConnectionQuality(packetsLostRatio, packetsPerSecond, roundTripTime, kind) {
+	_calculateConnectionQuality(kind) {
+		const packetsLostRatio = this._packetsLostRatio[kind]
+		const packetsPerSecond = this._packetsPerSecond[kind]
+		const roundTripTime = this._roundTripTime[kind]
+
 		if (!packetsLostRatio.hasEnoughData() || !packetsPerSecond.hasEnoughData()) {
 			return CONNECTION_QUALITY.UNKNOWN
 		}