Removing deprecated events syntax.

tools/dom/templates/html/impl/impl_EventTarget.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;
 
 /**
  * Base class that supports listening for and dispatching browser events.
  *
  * Events can either be accessed by string name (using the indexed getter) or by
  * getters exposed by subclasses. Use the getters exposed by subclasses when
  * possible for better compile-time type checks.
  *
  * Using an indexed getter:
  *     events['mouseover'].add((e) => print("Mouse over!"));
  *
  * Using a getter provided by a subclass:
  *     elementEvents.mouseOver.add((e) => print("Mouse over!"));
  */
 class Events {
   /* Raw event target. */
   final EventTarget _ptr;
 
   Events(this._ptr);
 
-  EventListenerList operator [](String type) {
-    return new EventListenerList(_ptr, type);
+  Stream operator [](String type) {
+    return new _EventStream(_ptr, type, false);
   }
 }
 
-/**
- * Supports adding, removing, and dispatching events for a specific event type.
- */
-class EventListenerList {
-
-  final EventTarget _ptr;
-  final String _type;
-
-  EventListenerList(this._ptr, this._type);
-
-  // TODO(jacobr): implement equals.
-
-  EventListenerList add(EventListener listener,
-      [bool useCapture = false]) {
-    _add(listener, useCapture);
-    return this;
-  }
-
-  EventListenerList remove(EventListener listener,
-      [bool useCapture = false]) {
-    _remove(listener, useCapture);
-    return this;
-  }
-
-  bool dispatch(Event evt) {
-    return _ptr.dispatchEvent(evt);
-  }
-
-  void _add(EventListener listener, bool useCapture) {
-    _ptr.$dom_addEventListener(_type, listener, useCapture);
-  }
-
-  void _remove(EventListener listener, bool useCapture) {
-    _ptr.$dom_removeEventListener(_type, listener, useCapture);
-  }
-}
-
 /**
  * Base class for all browser objects that support events.
  *
  * Use the [on] property to add, remove, and dispatch events (rather than
  * [$dom_addEventListener], [$dom_dispatchEvent], and
  * [$dom_removeEventListener]) for compile-time type checks and a more concise
  * API.
  */
 $(ANNOTATIONS)class $CLASSNAME$EXTENDS$IMPLEMENTS$NATIVESPEC {
 
   @DomName('EventTarget.addEventListener, EventTarget.removeEventListener, EventTarget.dispatchEvent')
   Events get on => new Events(this);
 $!MEMBERS
 }