Revert "[Experiment] Stop suppressing DragEvent"

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 cd425135f3c51adb8a621a4d06879eb514005b7e..0727fdd0acbd2239aafd92d6aabdd1771e899a25 100644
--- a/sdk/lib/html/dartium/html_dartium.dart
+++ b/sdk/lib/html/dartium/html_dartium.dart
@@ -252,7 +252,6 @@ final htmlBlinkMap = {
   'Document': () => Document.instanceRuntimeType,
   'DocumentFragment': () => DocumentFragment.instanceRuntimeType,
   'DocumentType': () => _DocumentType.instanceRuntimeType,
-  'DragEvent': () => DragEvent.instanceRuntimeType,
   'EffectModel': () => EffectModel.instanceRuntimeType,
   'Element': () => Element.instanceRuntimeType,
   'Entry': () => Entry.instanceRuntimeType,
@@ -11092,37 +11091,37 @@ class Document extends Node {
   /// Stream of `drag` events handled by this [Document].
   @DomName('Document.ondrag')
   @DocsEditable()
-  Stream<DragEvent> get onDrag => Element.dragEvent.forTarget(this);
+  Stream<MouseEvent> get onDrag => Element.dragEvent.forTarget(this);
 
   /// Stream of `dragend` events handled by this [Document].
   @DomName('Document.ondragend')
   @DocsEditable()
-  Stream<DragEvent> get onDragEnd => Element.dragEndEvent.forTarget(this);
+  Stream<MouseEvent> get onDragEnd => Element.dragEndEvent.forTarget(this);
 
   /// Stream of `dragenter` events handled by this [Document].
   @DomName('Document.ondragenter')
   @DocsEditable()
-  Stream<DragEvent> get onDragEnter => Element.dragEnterEvent.forTarget(this);
+  Stream<MouseEvent> get onDragEnter => Element.dragEnterEvent.forTarget(this);
 
   /// Stream of `dragleave` events handled by this [Document].
   @DomName('Document.ondragleave')
   @DocsEditable()
-  Stream<DragEvent> get onDragLeave => Element.dragLeaveEvent.forTarget(this);
+  Stream<MouseEvent> get onDragLeave => Element.dragLeaveEvent.forTarget(this);
 
   /// Stream of `dragover` events handled by this [Document].
   @DomName('Document.ondragover')
   @DocsEditable()
-  Stream<DragEvent> get onDragOver => Element.dragOverEvent.forTarget(this);
+  Stream<MouseEvent> get onDragOver => Element.dragOverEvent.forTarget(this);
 
   /// Stream of `dragstart` events handled by this [Document].
   @DomName('Document.ondragstart')
   @DocsEditable()
-  Stream<DragEvent> get onDragStart => Element.dragStartEvent.forTarget(this);
+  Stream<MouseEvent> get onDragStart => Element.dragStartEvent.forTarget(this);
 
   /// Stream of `drop` events handled by this [Document].
   @DomName('Document.ondrop')
   @DocsEditable()
-  Stream<DragEvent> get onDrop => Element.dropEvent.forTarget(this);
+  Stream<MouseEvent> get onDrop => Element.dropEvent.forTarget(this);
 
   @DomName('Document.ondurationchange')
   @DocsEditable()
@@ -12955,44 +12954,6 @@ class DomTokenList extends DartHtmlDomObject {
 // WARNING: Do not edit - generated code.
 
 @DocsEditable()
-@DomName('DragEvent')
-@Experimental() // untriaged
-class DragEvent extends MouseEvent {
-  // To suppress missing implicit constructor warnings.
-  factory DragEvent._() {
-    throw new UnsupportedError("Not supported");
-  }
-
-  @DomName('DragEvent.DragEvent')
-  @DocsEditable()
-  factory DragEvent(String type, [Map eventInitDict]) {
-    if (eventInitDict != null) {
-      var eventInitDict_1 = convertDartToNative_Dictionary(eventInitDict);
-      return _blink.BlinkDragEvent.instance
-          .constructorCallback_2_(type, eventInitDict_1);
-    }
-    return _blink.BlinkDragEvent.instance.constructorCallback_1_(type);
-  }
-
-  @Deprecated("Internal Use Only")
-  external static Type get instanceRuntimeType;
-
-  @Deprecated("Internal Use Only")
-  DragEvent.internal_() : super.internal_();
-
-  @DomName('DragEvent.dataTransfer')
-  @DocsEditable()
-  @Experimental() // untriaged
-  DataTransfer get dataTransfer =>
-      _blink.BlinkDragEvent.instance.dataTransfer_Getter_(this);
-}
-// 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.
-
-// WARNING: Do not edit - generated code.
-
-@DocsEditable()
 @DomName('EffectModel')
 @Experimental() // untriaged
 class EffectModel extends DartHtmlDomObject {
@@ -13341,7 +13302,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    */
   @DomName('Element.ondrag')
   @DocsEditable()
-  ElementStream<DragEvent> get onDrag;
+  ElementStream<MouseEvent> get onDrag;
 
   /**
    * A stream of `dragend` events fired when this element completes a drag
@@ -13359,7 +13320,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    */
   @DomName('Element.ondragend')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragEnd;
+  ElementStream<MouseEvent> get onDragEnd;
 
   /**
    * A stream of `dragenter` events fired when a dragged object is first dragged
@@ -13377,7 +13338,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    */
   @DomName('Element.ondragenter')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragEnter;
+  ElementStream<MouseEvent> get onDragEnter;
 
   /**
    * A stream of `dragleave` events fired when an object being dragged over this
@@ -13395,7 +13356,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    */
   @DomName('Element.ondragleave')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragLeave;
+  ElementStream<MouseEvent> get onDragLeave;
 
   /**
    * A stream of `dragover` events fired when a dragged object is currently
@@ -13413,7 +13374,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    */
   @DomName('Element.ondragover')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragOver;
+  ElementStream<MouseEvent> get onDragOver;
 
   /**
    * A stream of `dragstart` events fired when this element starts being
@@ -13431,7 +13392,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    */
   @DomName('Element.ondragstart')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragStart;
+  ElementStream<MouseEvent> get onDragStart;
 
   /**
    * A stream of `drop` events fired when a dragged object is dropped on this
@@ -13449,7 +13410,7 @@ abstract class ElementList<T extends Element> extends ListBase<T> {
    */
   @DomName('Element.ondrop')
   @DocsEditable()
-  ElementStream<DragEvent> get onDrop;
+  ElementStream<MouseEvent> get onDrop;
 
   @DomName('Element.ondurationchange')
   @DocsEditable()
@@ -13885,7 +13846,7 @@ class _FrozenElementList<E extends Element> extends ListBase<E>
    */
   @DomName('Element.ondrag')
   @DocsEditable()
-  ElementStream<DragEvent> get onDrag =>
+  ElementStream<MouseEvent> get onDrag =>
       Element.dragEvent._forElementList(this);
 
   /**
@@ -13904,7 +13865,7 @@ class _FrozenElementList<E extends Element> extends ListBase<E>
    */
   @DomName('Element.ondragend')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragEnd =>
+  ElementStream<MouseEvent> get onDragEnd =>
       Element.dragEndEvent._forElementList(this);
 
   /**
@@ -13923,7 +13884,7 @@ class _FrozenElementList<E extends Element> extends ListBase<E>
    */
   @DomName('Element.ondragenter')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragEnter =>
+  ElementStream<MouseEvent> get onDragEnter =>
       Element.dragEnterEvent._forElementList(this);
 
   /**
@@ -13942,7 +13903,7 @@ class _FrozenElementList<E extends Element> extends ListBase<E>
    */
   @DomName('Element.ondragleave')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragLeave =>
+  ElementStream<MouseEvent> get onDragLeave =>
       Element.dragLeaveEvent._forElementList(this);
 
   /**
@@ -13961,7 +13922,7 @@ class _FrozenElementList<E extends Element> extends ListBase<E>
    */
   @DomName('Element.ondragover')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragOver =>
+  ElementStream<MouseEvent> get onDragOver =>
       Element.dragOverEvent._forElementList(this);
 
   /**
@@ -13980,7 +13941,7 @@ class _FrozenElementList<E extends Element> extends ListBase<E>
    */
   @DomName('Element.ondragstart')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragStart =>
+  ElementStream<MouseEvent> get onDragStart =>
       Element.dragStartEvent._forElementList(this);
 
   /**
@@ -13999,7 +13960,7 @@ class _FrozenElementList<E extends Element> extends ListBase<E>
    */
   @DomName('Element.ondrop')
   @DocsEditable()
-  ElementStream<DragEvent> get onDrop =>
+  ElementStream<MouseEvent> get onDrop =>
       Element.dropEvent._forElementList(this);
 
   @DomName('Element.ondurationchange')
@@ -15546,8 +15507,8 @@ class Element extends Node
    */
   @DomName('Element.dragEvent')
   @DocsEditable()
-  static const EventStreamProvider<DragEvent> dragEvent =
-      const EventStreamProvider<DragEvent>('drag');
+  static const EventStreamProvider<MouseEvent> dragEvent =
+      const EventStreamProvider<MouseEvent>('drag');
 
   /**
    * A stream of `dragend` events fired when an element completes a drag
@@ -15565,8 +15526,8 @@ class Element extends Node
    */
   @DomName('Element.dragendEvent')
   @DocsEditable()
-  static const EventStreamProvider<DragEvent> dragEndEvent =
-      const EventStreamProvider<DragEvent>('dragend');
+  static const EventStreamProvider<MouseEvent> dragEndEvent =
+      const EventStreamProvider<MouseEvent>('dragend');
 
   /**
    * A stream of `dragenter` events fired when a dragged object is first dragged
@@ -15584,8 +15545,8 @@ class Element extends Node
    */
   @DomName('Element.dragenterEvent')
   @DocsEditable()
-  static const EventStreamProvider<DragEvent> dragEnterEvent =
-      const EventStreamProvider<DragEvent>('dragenter');
+  static const EventStreamProvider<MouseEvent> dragEnterEvent =
+      const EventStreamProvider<MouseEvent>('dragenter');
 
   /**
    * A stream of `dragleave` events fired when an object being dragged over an
@@ -15603,8 +15564,8 @@ class Element extends Node
    */
   @DomName('Element.dragleaveEvent')
   @DocsEditable()
-  static const EventStreamProvider<DragEvent> dragLeaveEvent =
-      const EventStreamProvider<DragEvent>('dragleave');
+  static const EventStreamProvider<MouseEvent> dragLeaveEvent =
+      const EventStreamProvider<MouseEvent>('dragleave');
 
   /**
    * A stream of `dragover` events fired when a dragged object is currently
@@ -15622,8 +15583,8 @@ class Element extends Node
    */
   @DomName('Element.dragoverEvent')
   @DocsEditable()
-  static const EventStreamProvider<DragEvent> dragOverEvent =
-      const EventStreamProvider<DragEvent>('dragover');
+  static const EventStreamProvider<MouseEvent> dragOverEvent =
+      const EventStreamProvider<MouseEvent>('dragover');
 
   /**
    * A stream of `dragstart` events for a dragged element whose drag has begun.
@@ -15640,8 +15601,8 @@ class Element extends Node
    */
   @DomName('Element.dragstartEvent')
   @DocsEditable()
-  static const EventStreamProvider<DragEvent> dragStartEvent =
-      const EventStreamProvider<DragEvent>('dragstart');
+  static const EventStreamProvider<MouseEvent> dragStartEvent =
+      const EventStreamProvider<MouseEvent>('dragstart');
 
   /**
    * A stream of `drop` events fired when a dragged object is dropped on an
@@ -15659,8 +15620,8 @@ class Element extends Node
    */
   @DomName('Element.dropEvent')
   @DocsEditable()
-  static const EventStreamProvider<DragEvent> dropEvent =
-      const EventStreamProvider<DragEvent>('drop');
+  static const EventStreamProvider<MouseEvent> dropEvent =
+      const EventStreamProvider<MouseEvent>('drop');
 
   @DomName('Element.durationchangeEvent')
   @DocsEditable()
@@ -16725,7 +16686,7 @@ class Element extends Node
    */
   @DomName('Element.ondrag')
   @DocsEditable()
-  ElementStream<DragEvent> get onDrag => dragEvent.forElement(this);
+  ElementStream<MouseEvent> get onDrag => dragEvent.forElement(this);
 
   /**
    * A stream of `dragend` events fired when this element completes a drag
@@ -16743,7 +16704,7 @@ class Element extends Node
    */
   @DomName('Element.ondragend')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragEnd => dragEndEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragEnd => dragEndEvent.forElement(this);
 
   /**
    * A stream of `dragenter` events fired when a dragged object is first dragged
@@ -16761,7 +16722,7 @@ class Element extends Node
    */
   @DomName('Element.ondragenter')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragEnter => dragEnterEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragEnter => dragEnterEvent.forElement(this);
 
   /**
    * A stream of `dragleave` events fired when an object being dragged over this
@@ -16779,7 +16740,7 @@ class Element extends Node
    */
   @DomName('Element.ondragleave')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragLeave => dragLeaveEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragLeave => dragLeaveEvent.forElement(this);
 
   /**
    * A stream of `dragover` events fired when a dragged object is currently
@@ -16797,7 +16758,7 @@ class Element extends Node
    */
   @DomName('Element.ondragover')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragOver => dragOverEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragOver => dragOverEvent.forElement(this);
 
   /**
    * A stream of `dragstart` events fired when this element starts being
@@ -16815,7 +16776,7 @@ class Element extends Node
    */
   @DomName('Element.ondragstart')
   @DocsEditable()
-  ElementStream<DragEvent> get onDragStart => dragStartEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragStart => dragStartEvent.forElement(this);
 
   /**
    * A stream of `drop` events fired when a dragged object is dropped on this
@@ -16833,7 +16794,7 @@ class Element extends Node
    */
   @DomName('Element.ondrop')
   @DocsEditable()
-  ElementStream<DragEvent> get onDrop => dropEvent.forElement(this);
+  ElementStream<MouseEvent> get onDrop => dropEvent.forElement(this);
 
   @DomName('Element.ondurationchange')
   @DocsEditable()
@@ -19917,44 +19878,44 @@ abstract class GlobalEventHandlers implements EventTarget {
   @DomName('GlobalEventHandlers.dragEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragEvent =
-      const EventStreamProvider<DragEvent>('drag');
+  static const EventStreamProvider<MouseEvent> dragEvent =
+      const EventStreamProvider<MouseEvent>('drag');
 
   @DomName('GlobalEventHandlers.dragendEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragEndEvent =
-      const EventStreamProvider<DragEvent>('dragend');
+  static const EventStreamProvider<MouseEvent> dragEndEvent =
+      const EventStreamProvider<MouseEvent>('dragend');
 
   @DomName('GlobalEventHandlers.dragenterEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragEnterEvent =
-      const EventStreamProvider<DragEvent>('dragenter');
+  static const EventStreamProvider<MouseEvent> dragEnterEvent =
+      const EventStreamProvider<MouseEvent>('dragenter');
 
   @DomName('GlobalEventHandlers.dragleaveEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragLeaveEvent =
-      const EventStreamProvider<DragEvent>('dragleave');
+  static const EventStreamProvider<MouseEvent> dragLeaveEvent =
+      const EventStreamProvider<MouseEvent>('dragleave');
 
   @DomName('GlobalEventHandlers.dragoverEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragOverEvent =
-      const EventStreamProvider<DragEvent>('dragover');
+  static const EventStreamProvider<MouseEvent> dragOverEvent =
+      const EventStreamProvider<MouseEvent>('dragover');
 
   @DomName('GlobalEventHandlers.dragstartEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragStartEvent =
-      const EventStreamProvider<DragEvent>('dragstart');
+  static const EventStreamProvider<MouseEvent> dragStartEvent =
+      const EventStreamProvider<MouseEvent>('dragstart');
 
   @DomName('GlobalEventHandlers.dropEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dropEvent =
-      const EventStreamProvider<DragEvent>('drop');
+  static const EventStreamProvider<MouseEvent> dropEvent =
+      const EventStreamProvider<MouseEvent>('drop');
 
   @DomName('GlobalEventHandlers.durationchangeEvent')
   @DocsEditable()
@@ -20245,37 +20206,37 @@ abstract class GlobalEventHandlers implements EventTarget {
   @DomName('GlobalEventHandlers.ondrag')
   @DocsEditable()
   @Experimental() // untriaged
-  Stream<DragEvent> get onDrag => dragEvent.forTarget(this);
+  Stream<MouseEvent> get onDrag => dragEvent.forTarget(this);
 
   @DomName('GlobalEventHandlers.ondragend')
   @DocsEditable()
   @Experimental() // untriaged
-  Stream<DragEvent> get onDragEnd => dragEndEvent.forTarget(this);
+  Stream<MouseEvent> get onDragEnd => dragEndEvent.forTarget(this);
 
   @DomName('GlobalEventHandlers.ondragenter')
   @DocsEditable()
   @Experimental() // untriaged
-  Stream<DragEvent> get onDragEnter => dragEnterEvent.forTarget(this);
+  Stream<MouseEvent> get onDragEnter => dragEnterEvent.forTarget(this);
 
   @DomName('GlobalEventHandlers.ondragleave')
   @DocsEditable()
   @Experimental() // untriaged
-  Stream<DragEvent> get onDragLeave => dragLeaveEvent.forTarget(this);
+  Stream<MouseEvent> get onDragLeave => dragLeaveEvent.forTarget(this);
 
   @DomName('GlobalEventHandlers.ondragover')
   @DocsEditable()
   @Experimental() // untriaged
-  Stream<DragEvent> get onDragOver => dragOverEvent.forTarget(this);
+  Stream<MouseEvent> get onDragOver => dragOverEvent.forTarget(this);
 
   @DomName('GlobalEventHandlers.ondragstart')
   @DocsEditable()
   @Experimental() // untriaged
-  Stream<DragEvent> get onDragStart => dragStartEvent.forTarget(this);
+  Stream<MouseEvent> get onDragStart => dragStartEvent.forTarget(this);
 
   @DomName('GlobalEventHandlers.ondrop')
   @DocsEditable()
   @Experimental() // untriaged
-  Stream<DragEvent> get onDrop => dropEvent.forTarget(this);
+  Stream<MouseEvent> get onDrop => dropEvent.forTarget(this);
 
   @DomName('GlobalEventHandlers.ondurationchange')
   @DocsEditable()
@@ -21459,44 +21420,44 @@ class HtmlElement extends Element implements GlobalEventHandlers {
   @DomName('HTMLElement.dragEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragEvent =
-      const EventStreamProvider<DragEvent>('drag');
+  static const EventStreamProvider<MouseEvent> dragEvent =
+      const EventStreamProvider<MouseEvent>('drag');
 
   @DomName('HTMLElement.dragendEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragEndEvent =
-      const EventStreamProvider<DragEvent>('dragend');
+  static const EventStreamProvider<MouseEvent> dragEndEvent =
+      const EventStreamProvider<MouseEvent>('dragend');
 
   @DomName('HTMLElement.dragenterEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragEnterEvent =
-      const EventStreamProvider<DragEvent>('dragenter');
+  static const EventStreamProvider<MouseEvent> dragEnterEvent =
+      const EventStreamProvider<MouseEvent>('dragenter');
 
   @DomName('HTMLElement.dragleaveEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragLeaveEvent =
-      const EventStreamProvider<DragEvent>('dragleave');
+  static const EventStreamProvider<MouseEvent> dragLeaveEvent =
+      const EventStreamProvider<MouseEvent>('dragleave');
 
   @DomName('HTMLElement.dragoverEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragOverEvent =
-      const EventStreamProvider<DragEvent>('dragover');
+  static const EventStreamProvider<MouseEvent> dragOverEvent =
+      const EventStreamProvider<MouseEvent>('dragover');
 
   @DomName('HTMLElement.dragstartEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragStartEvent =
-      const EventStreamProvider<DragEvent>('dragstart');
+  static const EventStreamProvider<MouseEvent> dragStartEvent =
+      const EventStreamProvider<MouseEvent>('dragstart');
 
   @DomName('HTMLElement.dropEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dropEvent =
-      const EventStreamProvider<DragEvent>('drop');
+  static const EventStreamProvider<MouseEvent> dropEvent =
+      const EventStreamProvider<MouseEvent>('drop');
 
   @DomName('HTMLElement.durationchangeEvent')
   @DocsEditable()
@@ -21946,37 +21907,37 @@ class HtmlElement extends Element implements GlobalEventHandlers {
   @DomName('HTMLElement.ondrag')
   @DocsEditable()
   @Experimental() // untriaged
-  ElementStream<DragEvent> get onDrag => dragEvent.forElement(this);
+  ElementStream<MouseEvent> get onDrag => dragEvent.forElement(this);
 
   @DomName('HTMLElement.ondragend')
   @DocsEditable()
   @Experimental() // untriaged
-  ElementStream<DragEvent> get onDragEnd => dragEndEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragEnd => dragEndEvent.forElement(this);
 
   @DomName('HTMLElement.ondragenter')
   @DocsEditable()
   @Experimental() // untriaged
-  ElementStream<DragEvent> get onDragEnter => dragEnterEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragEnter => dragEnterEvent.forElement(this);
 
   @DomName('HTMLElement.ondragleave')
   @DocsEditable()
   @Experimental() // untriaged
-  ElementStream<DragEvent> get onDragLeave => dragLeaveEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragLeave => dragLeaveEvent.forElement(this);
 
   @DomName('HTMLElement.ondragover')
   @DocsEditable()
   @Experimental() // untriaged
-  ElementStream<DragEvent> get onDragOver => dragOverEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragOver => dragOverEvent.forElement(this);
 
   @DomName('HTMLElement.ondragstart')
   @DocsEditable()
   @Experimental() // untriaged
-  ElementStream<DragEvent> get onDragStart => dragStartEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragStart => dragStartEvent.forElement(this);
 
   @DomName('HTMLElement.ondrop')
   @DocsEditable()
   @Experimental() // untriaged
-  ElementStream<DragEvent> get onDrop => dropEvent.forElement(this);
+  ElementStream<MouseEvent> get onDrop => dropEvent.forElement(this);
 
   @DomName('HTMLElement.ondurationchange')
   @DocsEditable()
@@ -44344,37 +44305,37 @@ class Window extends EventTarget
   /// Stream of `drag` events handled by this [Window].
   @DomName('Window.ondrag')
   @DocsEditable()
-  Stream<DragEvent> get onDrag => Element.dragEvent.forTarget(this);
+  Stream<MouseEvent> get onDrag => Element.dragEvent.forTarget(this);
 
   /// Stream of `dragend` events handled by this [Window].
   @DomName('Window.ondragend')
   @DocsEditable()
-  Stream<DragEvent> get onDragEnd => Element.dragEndEvent.forTarget(this);
+  Stream<MouseEvent> get onDragEnd => Element.dragEndEvent.forTarget(this);
 
   /// Stream of `dragenter` events handled by this [Window].
   @DomName('Window.ondragenter')
   @DocsEditable()
-  Stream<DragEvent> get onDragEnter => Element.dragEnterEvent.forTarget(this);
+  Stream<MouseEvent> get onDragEnter => Element.dragEnterEvent.forTarget(this);
 
   /// Stream of `dragleave` events handled by this [Window].
   @DomName('Window.ondragleave')
   @DocsEditable()
-  Stream<DragEvent> get onDragLeave => Element.dragLeaveEvent.forTarget(this);
+  Stream<MouseEvent> get onDragLeave => Element.dragLeaveEvent.forTarget(this);
 
   /// Stream of `dragover` events handled by this [Window].
   @DomName('Window.ondragover')
   @DocsEditable()
-  Stream<DragEvent> get onDragOver => Element.dragOverEvent.forTarget(this);
+  Stream<MouseEvent> get onDragOver => Element.dragOverEvent.forTarget(this);
 
   /// Stream of `dragstart` events handled by this [Window].
   @DomName('Window.ondragstart')
   @DocsEditable()
-  Stream<DragEvent> get onDragStart => Element.dragStartEvent.forTarget(this);
+  Stream<MouseEvent> get onDragStart => Element.dragStartEvent.forTarget(this);
 
   /// Stream of `drop` events handled by this [Window].
   @DomName('Window.ondrop')
   @DocsEditable()
-  Stream<DragEvent> get onDrop => Element.dropEvent.forTarget(this);
+  Stream<MouseEvent> get onDrop => Element.dropEvent.forTarget(this);
 
   @DomName('Window.ondurationchange')
   @DocsEditable()