Add counters for all of the WebAudio nodes and important methods.

Source/core/frame/UseCounter.h

Index: Source/core/frame/UseCounter.h
diff --git a/Source/core/frame/UseCounter.h b/Source/core/frame/UseCounter.h
index 4b02c83bfa474767da5839ae5ccbd95214b18875..18a7ea51c00d0eb9fbcba781557bdb9c3af05e82 100644
--- a/Source/core/frame/UseCounter.h
+++ b/Source/core/frame/UseCounter.h
@@ -570,6 +570,31 @@ public:
         CSSSelectorPseudoFullScreenAncestor = 628,
         CSSSelectorPseudoFullScreen = 629,
         WebKitCSSMatrix = 630,
+        AudioContextCreateAnalyser = 631,
+        AudioContextCreateBiquadFilter = 632,
+        AudioContextCreateBufferSource = 633,
+        AudioContextCreateChannelMerger = 634,
+        AudioContextCreateChannelSplitter = 635,
+        AudioContextCreateConvolver = 636,
+        AudioContextCreateDelay = 637,
+        AudioContextCreateDynamicsCompressor = 638,
+        AudioContextCreateGain = 639,
+        AudioContextCreateMediaElementSource = 640,
+        AudioContextCreateMediaStreamDestination = 641,
+        AudioContextCreateMediaStreamSource = 642,
+        AudioContextCreateOscillator = 643,
+        AudioContextCreatePanner = 644,
+        AudioContextCreatePeriodicWave = 645,
+        AudioContextCreateScriptProcessor = 646,
+        AudioContextCreateStereoPanner = 647,
+        AudioContextCreateWaveShaper = 648,
+        AudioContextDecodeAudioData = 649,
+        AudioContextResume = 650,
+        AudioContextSuspend = 651,
+        AudioContext = 652,
+        OfflineAudioContext = 653,
+        PrefixedAudioContext = 654,
+        PrefixedOfflineAudioContext = 655,
 
         // Add new features immediately above this line. Don't change assigned
         // numbers of any item, and don't reuse removed slots.