Revert all html warning changes.

sdk/lib/html/dartium/html_dartium.dart

Index: sdk/lib/html/dartium/html_dartium.dart
diff --git a/sdk/lib/html/dartium/html_dartium.dart b/sdk/lib/html/dartium/html_dartium.dart
index ab9ff52b06b1db3f5f8dfb410f22231cdf244798..9f5f8aba4244329ac8a8fec7f60cd18365c347fb 100644
--- a/sdk/lib/html/dartium/html_dartium.dart
+++ b/sdk/lib/html/dartium/html_dartium.dart
@@ -101,7 +101,7 @@ HtmlDocument get document {
 
 @DocsEditable()
 @DomName('AbstractWorker')
-abstract class AbstractWorker extends NativeFieldWrapperClass2 implements EventTarget {
+class AbstractWorker extends NativeFieldWrapperClass2 implements EventTarget {
   // To suppress missing implicit constructor warnings.
   factory AbstractWorker._() { throw new UnsupportedError("Not supported"); }
 
@@ -304,12 +304,6 @@ class AnchorElement extends HtmlElement implements UrlUtils {
   @DocsEditable()
   void set href(String value) native "HTMLAnchorElement_href_Setter";
 
-  @DomName('HTMLAnchorElement.origin')
-  @DocsEditable()
-  // WebKit only
-  @Experimental() // non-standard
-  String get origin native "HTMLAnchorElement_origin_Getter";
-
   @DomName('HTMLAnchorElement.password')
   @DocsEditable()
   @Experimental() // untriaged
@@ -8297,16 +8291,13 @@ class DocumentFragment extends Node implements ParentNode {
         validator: validator, treeSanitizer: treeSanitizer);
   }
 
-  HtmlCollection get _children => throw new UnimplementedError(
-      'Use _docChildren instead');
-
-  List<Element> _docChildren;
+  List<Element> _children;
 
   List<Element> get children {
-    if (_docChildren == null) {
-      _docChildren = new FilteredElementList(this);
+    if (_children == null) {
+      _children = new FilteredElementList(this);
     }
-    return _docChildren;
+    return _children;
   }
 
   void set children(List<Element> value) {
@@ -11195,6 +11186,8 @@ abstract class Element extends Node implements GlobalEventHandlers, ParentNode,
 
   bool hidden;
 
+  InputMethodContext get inputMethodContext;
+
   bool get isContentEditable;
 
   String lang;
@@ -15603,6 +15596,10 @@ class HtmlFormControlsCollection extends HtmlCollection {
   // To suppress missing implicit constructor warnings.
   factory HtmlFormControlsCollection._() { throw new UnsupportedError("Not supported"); }
 
+  @DomName('HTMLFormControlsCollection.__getter__')
+  @DocsEditable()
+  Node __getter__(int index) native "HTMLFormControlsCollection___getter___Callback";
+
   @DomName('HTMLFormControlsCollection.namedItem')
   @DocsEditable()
   Node namedItem(String name) native "HTMLFormControlsCollection_namedItem_Callback";
@@ -31609,15 +31606,6 @@ class _BeforeUnloadEventStreamProvider implements
   String getEventType(EventTarget target) {
     return _eventType;
   }
-
-  ElementStream<BeforeUnloadEvent> forElement(Element e, {bool useCapture: false}) {
-    return new _ElementEventStreamImpl(e, _eventType, useCapture);
-  }
-
-  ElementStream<BeforeUnloadEvent> _forElementList(ElementList e,
-      {bool useCapture: false}) {
-    return new _ElementListEventStreamImpl(e, _eventType, useCapture);
-  }
 }
 // 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
@@ -31656,6 +31644,11 @@ abstract class WindowEventHandlers extends EventTarget {
   // To suppress missing implicit constructor warnings.
   factory WindowEventHandlers._() { throw new UnsupportedError("Not supported"); }
 
+  @DomName('WindowEventHandlers.beforeunloadEvent')
+  @DocsEditable()
+  @Experimental() // untriaged
+  static const EventStreamProvider<Event> beforeUnloadEvent = const EventStreamProvider<Event>('beforeunload');
+
   @DomName('WindowEventHandlers.hashchangeEvent')
   @DocsEditable()
   @Experimental() // untriaged
@@ -31696,6 +31689,11 @@ abstract class WindowEventHandlers extends EventTarget {
   @Experimental() // untriaged
   static const EventStreamProvider<Event> unloadEvent = const EventStreamProvider<Event>('unload');
 
+  @DomName('WindowEventHandlers.onbeforeunload')
+  @DocsEditable()
+  @Experimental() // untriaged
+  Stream<Event> get onBeforeUnload => beforeUnloadEvent.forTarget(this);
+
   @DomName('WindowEventHandlers.onhashchange')
   @DocsEditable()
   @Experimental() // untriaged
@@ -33925,10 +33923,6 @@ abstract class _XMLHttpRequestProgressEvent extends ProgressEvent {
  */
 class _WrappedEvent implements Event {
   final Event wrapped;
-
-  /** The CSS selector involved with event delegation. */
-  String _selector;
-
   _WrappedEvent(this.wrapped);
 
   bool get bubbles => wrapped.bubbles;
@@ -33966,43 +33960,6 @@ class _WrappedEvent implements Event {
   void stopPropagation() {
     wrapped.stopPropagation();
   }
-
-  /**
-   * A pointer to the element whose CSS selector matched within which an event
-   * was fired. If this Event was not associated with any Event delegation,
-   * accessing this value will throw an [UnsupportedError].
-   */
-  Element get matchingTarget {
-    if (_selector == null) {
-      throw new UnsupportedError('Cannot call matchingTarget if this Event did'
-          ' not arise as a result of event delegation.');
-    }
-    var currentTarget = this.currentTarget;
-    var target = this.target;
-    var matchedTarget;
-    do {
-      if (target.matches(_selector)) return target;
-      target = target.parent;
-    } while (target != null && target != currentTarget.parent);
-    throw new StateError('No selector matched for populating matchedTarget.');
-  }
-
-  /**
-   * This event's path, taking into account shadow DOM.
-   *
-   * ## Other resources
-   *
-   * * [Shadow DOM extensions to Event]
-   * (http://w3c.github.io/webcomponents/spec/shadow/#extensions-to-event) from
-   * W3C.
-   */
-  // https://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/shadow/index.html#extensions-to-event
-  @Experimental()
-  List<Node> get path => wrapped.path;
-
-  dynamic get _get_currentTarget => wrapped._get_currentTarget;
-
-  dynamic get _get_target => wrapped._get_target;
 }
 // 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
@@ -34336,7 +34293,7 @@ abstract class CanvasImageSource {}
  * * [DOM Window](https://developer.mozilla.org/en-US/docs/DOM/window) from MDN.
  * * [Window](http://www.w3.org/TR/Window/) from the W3C.
  */
-abstract class WindowBase {
+abstract class WindowBase implements EventTarget {
   // Fields.
 
   /**
@@ -35409,9 +35366,6 @@ class _CustomEventStreamProvider<T extends Event>
   String getEventType(EventTarget target) {
     return _eventTypeGetter(target);
   }
-
-  String get _eventType =>
-      throw new UnsupportedError('Access type through getEventType method.');
 }
 // DO NOT EDIT- this file is generated from running tool/generator.sh.
 
@@ -38137,17 +38091,6 @@ class KeyEvent extends _WrappedEvent implements KeyboardEvent {
     throw new UnsupportedError(
         "Cannot initialize a KeyboardEvent from a KeyEvent.");
   }
-  int get _layerX => throw new UnsupportedError('Not applicable to KeyEvent');
-  int get _layerY => throw new UnsupportedError('Not applicable to KeyEvent');
-  int get _pageX => throw new UnsupportedError('Not applicable to KeyEvent');
-  int get _pageY => throw new UnsupportedError('Not applicable to KeyEvent');
-  @Experimental() // untriaged
-  bool getModifierState(String keyArgument) => throw new UnimplementedError();
-  @Experimental() // untriaged
-  int get location => throw new UnimplementedError();
-  @Experimental() // untriaged
-  bool get repeat => throw new UnimplementedError();
-  dynamic get _get_view => throw new UnimplementedError();
 }
 // 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
@@ -38645,7 +38588,7 @@ class _Utils {
     // TODO(vsm): Move these checks into native code.
     ClassMirror cls = reflectClass(type);
     if (_isBuiltinType(cls)) {
-      throw new UnsupportedError("Invalid custom element from ${(cls.owner as LibraryMirror).uri}.");
+      throw new UnsupportedError("Invalid custom element from ${cls.owner.uri}.");
     }
     var className = MirrorSystem.getName(cls.simpleName);
     var createdConstructor = cls.declarations[new Symbol('$className.created')];