Cleaning up a bunch of DOM generation tables

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

-// Copyright (c) 2013, 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 $LIBRARY;
-
-$(ANNOTATIONS)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$NATIVESPEC {
-  Stream<AudioProcessingEvent> _eventStream;
-
-  /**
-   * Get a Stream that fires events when AudioProcessingEvents occur.
-   * This particular stream is special in that it only allows one listener to a
-   * given stream. Converting the returned Stream [asBroadcast] will likely ruin
-   * the soft-real-time properties which which these events are fired and can
-   * be processed.
-   */
-  Stream<AudioProcessingEvent> get onAudioProcess {
-    if (_eventStream == null) {
-      var controller = new StreamController(sync: true);
-      var callback = (audioData) {
-          if (controller.hasListener) {
-            // This stream is a strange combination of broadcast and single
-            // subscriber streams. We only allow one listener, but if there is
-            // no listener, we don't queue up events, we just drop them on the
-            // floor.
-            controller.add(audioData);
-          }
-        };
-      _setEventListener(callback);
-      _eventStream = controller.stream;
-    }
-    return _eventStream;
-  }
-
-$if DART2JS
-    _setEventListener(callback) {
-      JS('void', '#.onaudioprocess = #', this,
-          convertDartClosureToJS(callback, 1));
-    }
-$endif
-
-$!MEMBERS
-}