Revert "[Experiment] Stop suppressing DragEvent"

sdk/lib/svg/dartium/svg_dartium.dart

 /**
  * Scalable Vector Graphics:
  * Two-dimensional vector graphics with support for events and animation.
  *
  * For details about the features and syntax of SVG, a W3C standard,
  * refer to the
  * [Scalable Vector Graphics Specification](http://www.w3.org/TR/SVG/).
  */
 library dart.dom.svg;
 
@@ skipping 5362 matching lines @@
 
   @DomName('SVGElement.dblclickEvent')
   @DocsEditable()
   @Experimental() // untriaged
   static const EventStreamProvider<Event> doubleClickEvent =
       const EventStreamProvider<Event>('dblclick');
 
   @DomName('SVGElement.dragEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragEvent =
-      const EventStreamProvider<DragEvent>('drag');
+  static const EventStreamProvider<MouseEvent> dragEvent =
+      const EventStreamProvider<MouseEvent>('drag');
 
   @DomName('SVGElement.dragendEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragEndEvent =
-      const EventStreamProvider<DragEvent>('dragend');
+  static const EventStreamProvider<MouseEvent> dragEndEvent =
+      const EventStreamProvider<MouseEvent>('dragend');
 
   @DomName('SVGElement.dragenterEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragEnterEvent =
-      const EventStreamProvider<DragEvent>('dragenter');
+  static const EventStreamProvider<MouseEvent> dragEnterEvent =
+      const EventStreamProvider<MouseEvent>('dragenter');
 
   @DomName('SVGElement.dragleaveEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragLeaveEvent =
-      const EventStreamProvider<DragEvent>('dragleave');
+  static const EventStreamProvider<MouseEvent> dragLeaveEvent =
+      const EventStreamProvider<MouseEvent>('dragleave');
 
   @DomName('SVGElement.dragoverEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragOverEvent =
-      const EventStreamProvider<DragEvent>('dragover');
+  static const EventStreamProvider<MouseEvent> dragOverEvent =
+      const EventStreamProvider<MouseEvent>('dragover');
 
   @DomName('SVGElement.dragstartEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dragStartEvent =
-      const EventStreamProvider<DragEvent>('dragstart');
+  static const EventStreamProvider<MouseEvent> dragStartEvent =
+      const EventStreamProvider<MouseEvent>('dragstart');
 
   @DomName('SVGElement.dropEvent')
   @DocsEditable()
   @Experimental() // untriaged
-  static const EventStreamProvider<DragEvent> dropEvent =
-      const EventStreamProvider<DragEvent>('drop');
+  static const EventStreamProvider<MouseEvent> dropEvent =
+      const EventStreamProvider<MouseEvent>('drop');
 
   @DomName('SVGElement.durationchangeEvent')
   @DocsEditable()
   @Experimental() // untriaged
   static const EventStreamProvider<Event> durationChangeEvent =
       const EventStreamProvider<Event>('durationchange');
 
   @DomName('SVGElement.emptiedEvent')
   @DocsEditable()
   @Experimental() // untriaged
@@ skipping 328 matching lines @@
       contextMenuEvent.forElement(this);
 
   @DomName('SVGElement.ondblclick')
   @DocsEditable()
   @Experimental() // untriaged
   ElementStream<Event> get onDoubleClick => doubleClickEvent.forElement(this);
 
   @DomName('SVGElement.ondrag')
   @DocsEditable()
   @Experimental() // untriaged
-  ElementStream<DragEvent> get onDrag => dragEvent.forElement(this);
+  ElementStream<MouseEvent> get onDrag => dragEvent.forElement(this);
 
   @DomName('SVGElement.ondragend')
   @DocsEditable()
   @Experimental() // untriaged
-  ElementStream<DragEvent> get onDragEnd => dragEndEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragEnd => dragEndEvent.forElement(this);
 
   @DomName('SVGElement.ondragenter')
   @DocsEditable()
   @Experimental() // untriaged
-  ElementStream<DragEvent> get onDragEnter => dragEnterEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragEnter => dragEnterEvent.forElement(this);
 
   @DomName('SVGElement.ondragleave')
   @DocsEditable()
   @Experimental() // untriaged
-  ElementStream<DragEvent> get onDragLeave => dragLeaveEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragLeave => dragLeaveEvent.forElement(this);
 
   @DomName('SVGElement.ondragover')
   @DocsEditable()
   @Experimental() // untriaged
-  ElementStream<DragEvent> get onDragOver => dragOverEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragOver => dragOverEvent.forElement(this);
 
   @DomName('SVGElement.ondragstart')
   @DocsEditable()
   @Experimental() // untriaged
-  ElementStream<DragEvent> get onDragStart => dragStartEvent.forElement(this);
+  ElementStream<MouseEvent> get onDragStart => dragStartEvent.forElement(this);
 
   @DomName('SVGElement.ondrop')
   @DocsEditable()
   @Experimental() // untriaged
-  ElementStream<DragEvent> get onDrop => dropEvent.forElement(this);
+  ElementStream<MouseEvent> get onDrop => dropEvent.forElement(this);
 
   @DomName('SVGElement.ondurationchange')
   @DocsEditable()
   @Experimental() // untriaged
   ElementStream<Event> get onDurationChange =>
       durationChangeEvent.forElement(this);
 
   @DomName('SVGElement.onemptied')
   @DocsEditable()
   @Experimental() // untriaged
@@ skipping 1601 matching lines @@
    * Constructor instantiated by the DOM when a custom element has been created.
    *
    * This can only be called by subclasses from their created constructor.
    */
   _SVGMPathElement.created() : super.created();
 
   // Override these methods for Dartium _SVGMPathElement can't be abstract.
   AnimatedString get href =>
       _blink.BlinkSVGMPathElement.instance.href_Getter_(this);
 }