Removed DARTIUM codegen for IDLS (sdk/lib/dartium)

tools/dom/templates/html/impl/impl_HTMLAudioElement.darttemplate

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of $LIBRARYNAME;
 
 @DocsEditable()
 $(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
 $!MEMBERS
-$if JSINTEROP
-  factory AudioElement([String src]) {
-    if (src == null)
-      return _blink.BlinkHTMLAudioElement.instance.constructorCallback_0_();
-    else
-      return _blink.BlinkHTMLAudioElement.instance.constructorCallback_1_(src);
-  }
-$else
   factory AudioElement([String src]) => new AudioElement._(src);
-$endif
 }