Making all base class DOM types throw as well (to prevent a default constructor for DOM types that …

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 b6c10038cfdcf31aa569e49e2243e35fac240dff..5568efafff7a574056c4a9a1274e0252c10c1c44 100644
--- a/sdk/lib/web_audio/dartium/web_audio_dartium.dart
+++ b/sdk/lib/web_audio/dartium/web_audio_dartium.dart
@@ -89,6 +89,8 @@ class AnalyserNode extends AudioNode {
 // https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioBuffer-section
 @Experimental()
 class AudioBuffer extends NativeFieldWrapperClass1 {
+  // To suppress missing implicit constructor warnings.
+  factory AudioBuffer._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('AudioBuffer.duration')
   @DocsEditable()
@@ -509,6 +511,8 @@ class AudioDestinationNode extends AudioNode {
 // https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioListener-section
 @Experimental()
 class AudioListener extends NativeFieldWrapperClass1 {
+  // To suppress missing implicit constructor warnings.
+  factory AudioListener._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('AudioListener.dopplerFactor')
   @DocsEditable()
@@ -639,6 +643,8 @@ class AudioNode extends EventTarget {
 // https://dvcs.w3.org/hg/audio/raw-file/tip/webaudio/specification.html#AudioParam
 @Experimental()
 class AudioParam extends NativeFieldWrapperClass1 {
+  // To suppress missing implicit constructor warnings.
+  factory AudioParam._() { throw new UnsupportedError("Not supported"); }
 
   @DomName('AudioParam.defaultValue')
   @DocsEditable()
@@ -1315,6 +1321,8 @@ class PannerNode extends AudioNode {
 @DomName('PeriodicWave')
 @Experimental() // untriaged
 class PeriodicWave extends NativeFieldWrapperClass1 {
+  // To suppress missing implicit constructor warnings.
+  factory PeriodicWave._() { throw new UnsupportedError("Not supported"); }
 
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file