Add tests for options bounds in PannerNode's constructor

tests/wpt/metadata/MANIFEST.json

    "support"
   ],
   "webaudio/the-audio-api/the-pannernode-interface/ctor-panner.html": [
-   "5475a6210b724ab2d6a0cefedee9c5432953c61f",
+   "95e914a75f6784a76af79fcfce2e372ddb865814",
    "testharness"
   ],
   "webaudio/the-audio-api/the-pannernode-interface/distance-exponential.html": [

tests/wpt/web-platform-tests/webaudio/the-audio-api/the-pannernode-interface/ctor-panner.html

@@ -192,6 +192,67 @@
             'new PannerNode(c, ' + JSON.stringify(options) + ')')
             .throw(TypeError);
 
+        // Test maxDistance
+        options = {maxDistance: -1};
+        should(
+            () => {
+              node = new PannerNode(context, options);
+            },
+            'new PannerNode(c, ' + JSON.stringify(options) + ')')
+            .throw(RangeError);
+        options = {maxDistance: 100};
+        should(
+            () => {
+              node = new PannerNode(context, options);
+            },
+            'node7 = new PannerNode(c, ' + JSON.stringify(options) + ')')
+            .notThrow();
+        should(node.maxDistance, 'node7.maxDistance')
+            .beEqualTo(options.maxDistance);
+
+        // Test rolloffFactor
+        options = {rolloffFactor: -1};
+        should(
+            () => {
+              node = new PannerNode(context, options);
+            },
+            'new PannerNode(c, ' + JSON.stringify(options) + ')')
+            .throw(RangeError);
+        options = {rolloffFactor: 0.5};
+        should(
+            () => {
+              node = new PannerNode(context, options);
+            },
+            'node8 = new PannerNode(c, ' + JSON.stringify(options) + ')')
+            .notThrow();
+        should(node.rolloffFactor, 'node8.rolloffFactor')
+            .beEqualTo(options.rolloffFactor);
+
+        // Test coneOuterGain
+        options = {coneOuterGain: -1};
+        should(
+            () => {
+              node = new PannerNode(context, options);
+            },
+            'new PannerNode(c, ' + JSON.stringify(options) + ')')
+            .throw('InvalidStateError');
+        options = {coneOuterGain: 1.1};
+        should(
+            () => {
+              node = new PannerNode(context, options);
+            },
+            'new PannerNode(c, ' + JSON.stringify(options) + ')')
+            .throw('InvalidStateError');
+        options = {coneOuterGain: 0.5};
+        should(
+            () => {
+              node = new PannerNode(context, options);
+            },
+            'node9 = new PannerNode(c, ' + JSON.stringify(options) + ')')
+            .notThrow();
+        should(node.coneOuterGain, 'node9.coneOuterGain')
+            .beEqualTo(options.coneOuterGain);
+
         task.done();
       });
 
@@ -218,7 +279,7 @@
           rolloffFactor: 3 * Math.PI,
           coneInnerAngle: 4 * Math.PI,
           coneOuterAngle: 5 * Math.PI,
-          coneOuterGain: 6 * Math.PI
+          coneOuterGain: 0.1 * Math.PI
         };
 
         should(