Add property of AudioContext state API

Author: Richard Sentino

baselines/dom.generated.d.ts

@@ -321,6 +321,7 @@ interface AudioContext extends EventTarget {
     destination: AudioDestinationNode;
     listener: AudioListener;
     sampleRate: number;
+    state: string;
     createAnalyser(): AnalyserNode;
     createBiquadFilter(): BiquadFilterNode;
     createBuffer(numberOfChannels: number, length: number, sampleRate: number): AudioBuffer;

inputfiles/browser.webidl.xml

@@ -512,6 +512,7 @@
         <property name="destination" read-only="1" type="AudioDestinationNode" />
         <property name="listener" read-only="1" type="AudioListener" />
         <property name="sampleRate" read-only="1" type="float" />
+        <property name="state" read-only="1" type="DOMString" />
       </properties>
     </interface>
     <interface extends="AudioNode" name="AudioDestinationNode">