Switch dart:html objects not to be NativeFieldWrapper subclasses with JsInterop

sdk/lib/web_audio/dartium/web_audio_dartium.dart

Index: sdk/lib/web_audio/dartium/web_audio_dartium.dart
diff --git a/sdk/lib/web_audio/dartium/web_audio_dartium.dart b/sdk/lib/web_audio/dartium/web_audio_dartium.dart
index 00f927dde52dd53407d91b875c257e2cc60073fc..3f04c444491840f9891245cbccb8a20811813fd3 100644
--- a/sdk/lib/web_audio/dartium/web_audio_dartium.dart
+++ b/sdk/lib/web_audio/dartium/web_audio_dartium.dart
@@ -173,7 +173,7 @@ class AnalyserNode extends AudioNode {
 @DomName('AudioBuffer')
 // https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioBuffer-section
 @Experimental()
-class AudioBuffer extends NativeFieldWrapperClass2 {
+class AudioBuffer extends DartHtmlDomObject {
   // To suppress missing implicit constructor warnings.
   factory AudioBuffer._() { throw new UnsupportedError("Not supported"); }
 
@@ -181,8 +181,6 @@ class AudioBuffer extends NativeFieldWrapperClass2 {
     return new AudioBuffer._internalWrap();
   }
 
-  js.JsObject blink_jsObject;
-
   factory AudioBuffer._internalWrap() {
     return new AudioBuffer.internal_();
   }
@@ -556,7 +554,7 @@ class AudioDestinationNode extends AudioNode {
 @DomName('AudioListener')
 // https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioListener-section
 @Experimental()
-class AudioListener extends NativeFieldWrapperClass2 {
+class AudioListener extends DartHtmlDomObject {
   // To suppress missing implicit constructor warnings.
   factory AudioListener._() { throw new UnsupportedError("Not supported"); }
 
@@ -564,8 +562,6 @@ class AudioListener extends NativeFieldWrapperClass2 {
     return new AudioListener._internalWrap();
   }
 
-  js.JsObject blink_jsObject;
-
   factory AudioListener._internalWrap() {
     return new AudioListener.internal_();
   }
@@ -699,7 +695,7 @@ class AudioNode extends EventTarget {
 @DomName('AudioParam')
 // https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioParam
 @Experimental()
-class AudioParam extends NativeFieldWrapperClass2 {
+class AudioParam extends DartHtmlDomObject {
   // To suppress missing implicit constructor warnings.
   factory AudioParam._() { throw new UnsupportedError("Not supported"); }
 
@@ -707,8 +703,6 @@ class AudioParam extends NativeFieldWrapperClass2 {
     return new AudioParam._internalWrap();
   }
 
-  js.JsObject blink_jsObject;
-
   factory AudioParam._internalWrap() {
     return new AudioParam.internal_();
   }
@@ -1465,7 +1459,7 @@ class PannerNode extends AudioNode {
 @DocsEditable()
 @DomName('PeriodicWave')
 @Experimental() // untriaged
-class PeriodicWave extends NativeFieldWrapperClass2 {
+class PeriodicWave extends DartHtmlDomObject {
   // To suppress missing implicit constructor warnings.
   factory PeriodicWave._() { throw new UnsupportedError("Not supported"); }
 
@@ -1473,8 +1467,6 @@ class PeriodicWave extends NativeFieldWrapperClass2 {
     return new PeriodicWave._internalWrap();
   }
 
-  js.JsObject blink_jsObject;
-
   factory PeriodicWave._internalWrap() {
     return new PeriodicWave.internal_();
   }