Turn on webaudio for JS backends.

client/dom/generated/src/frog/AudioPannerNode.dart

+
+class AudioPannerNode extends AudioNode native "*AudioPannerNode" {
+
+  static final int EQUALPOWER = 0;
+
+  static final int HRTF = 1;
+
+  static final int SOUNDFIELD = 2;
+
+  AudioGain coneGain;
+
+  num coneInnerAngle;
+
+  num coneOuterAngle;
+
+  num coneOuterGain;
+
+  AudioGain distanceGain;
+
+  int distanceModel;
+
+  num maxDistance;
+
+  int panningModel;
+
+  num refDistance;
+
+  num rolloffFactor;
+
+  void setOrientation(num x, num y, num z) native;
+
+  void setPosition(num x, num y, num z) native;
+
+  void setVelocity(num x, num y, num z) native;
+}