getFileContents
Write the contents of the file being dragged out of the web view into |writer|. Returns the number of bytes sent to |writer|. If |writer| is NULL this method will return the size of the file contents in bytes. Call getFileName() to get a suggested name for the file.
Return
The number of bytes sent to writer. If writer is NULL the size of the file contents in bytes is returned.
Parameters
writer
Writes the contents into this object.