Backed out changeset 11421fcb32b5 (bug 1162050)

dom/events/EventStateManager.cpp

@@ -3432,6 +3432,32 @@ EventStateManager::PostHandleEvent(nsPresContext* aPresContext,
 
   case eDrop:
     {
+      // now fire the dragdrop event, for compatibility with XUL
+      if (mCurrentTarget && nsEventStatus_eConsumeNoDefault != *aStatus) {
+        nsCOMPtr<nsIContent> targetContent;
+        mCurrentTarget->GetContentForEvent(aEvent,
+                                           getter_AddRefs(targetContent));
+
+        nsCOMPtr<nsIWidget> widget = mCurrentTarget->GetNearestWidget();
+        WidgetDragEvent event(aEvent->IsTrusted(), eLegacyDragDrop, widget);
+
+        WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
+        event.mRefPoint = mouseEvent->mRefPoint;
+        if (mouseEvent->mWidget) {
+          event.mRefPoint += mouseEvent->mWidget->WidgetToScreenOffset();
+        }
+        event.mRefPoint -= widget->WidgetToScreenOffset();
+        event.mModifiers = mouseEvent->mModifiers;
+        event.buttons = mouseEvent->buttons;
+        event.inputSource = mouseEvent->inputSource;
+
+        nsEventStatus status = nsEventStatus_eIgnore;
+        nsCOMPtr<nsIPresShell> presShell = mPresContext->GetPresShell();
+        if (presShell) {
+          presShell->HandleEventWithTarget(&event, mCurrentTarget,
+                                           targetContent, &status);
+        }
+      }
       sLastDragOverFrame = nullptr;
       ClearGlobalActiveContent(this);
       break;