Measure WebAudio node constructor usage

third_party/WebKit/Source/modules/webaudio/DynamicsCompressorNode.idl

 /*
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 // See https://webaudio.github.io/web-audio-api/#the-dynamicscompressornode-interface
 [
     Constructor(BaseAudioContext context, optional DynamicsCompressorOptions options),
     RaisesException=Constructor,
+    Measure
 ]
 interface DynamicsCompressorNode : AudioNode {
     readonly attribute AudioParam threshold; // in Decibels
     readonly attribute AudioParam knee; // in Decibels
     readonly attribute AudioParam ratio; // unit-less
     readonly attribute float reduction; // in Decibels
     readonly attribute AudioParam attack; // in Seconds
     readonly attribute AudioParam release; // in Seconds
 };