StartDragAndDrop should return the completed operation

ui/views/widget/desktop_aura/desktop_drag_drop_client_win.cc

Index: ui/views/widget/desktop_aura/desktop_drag_drop_client_win.cc
diff --git a/ui/views/widget/desktop_aura/desktop_drag_drop_client_win.cc b/ui/views/widget/desktop_aura/desktop_drag_drop_client_win.cc
index 7521919abfc3c9fde14e358aec78e24a141c7f29..840e38221b4344295305214a7f6d7abf195841de 100644
--- a/ui/views/widget/desktop_aura/desktop_drag_drop_client_win.cc
+++ b/ui/views/widget/desktop_aura/desktop_drag_drop_client_win.cc
@@ -35,15 +35,19 @@ int DesktopDragDropClientWin::StartDragAndDrop(
   drag_operation_ = operation;
 
   drag_source_ = new ui::DragSourceWin;
-  DWORD effects;
-  DoDragDrop(ui::OSExchangeDataProviderWin::GetIDataObject(data),
-             drag_source_,
-             ui::DragDropTypes::DragOperationToDropEffect(operation),
-             &effects);
+  DWORD effect;
+  HRESULT result = DoDragDrop(
+      ui::OSExchangeDataProviderWin::GetIDataObject(data),
+      drag_source_,
+      ui::DragDropTypes::DragOperationToDropEffect(operation),
+      &effect);
 
   drag_drop_in_progress_ = false;
 
-  return drag_operation_;
+  if (result != DRAGDROP_S_DROP)
+    effect = DROPEFFECT_NONE;
+
+  return ui::DragDropTypes::DropEffectToDragOperation(effect);
 }
 
 void DesktopDragDropClientWin::DragUpdate(aura::Window* target,