public:

typedef cef_drag_operations_mask_t DragOperationsMask;

///

// Called when an external drag event enters the browser window. |dragData|

// contains the drag event data and |mask| represents the type of drag

// operation. Return false for default drag handling behavior or true to

// cancel the drag event.

///

/*--cef()--*/

virtual bool OnDragEnter(CefRefPtr<CefBrowser> browser,

CefRefPtr<CefDragData> dragData,

DragOperationsMask mask) { return false; }