gtkmozembed signaling

Hi,
      I have a small question about some design in the gtkmozembed code.

For the LINK_MESSAGE signal

The signaling code has

 mLinkMessage = aStatus;
 gtk_signal_emit(GTK_OBJECT(mOwner->mOwningWidget), 
moz_embed_signals[LINK_MESSAGE]);


The callback sequence then subsequently executes:

if (embedPrivate->mWindow){
   *getter_Copies(embedString) = 
NEW_TOOLKIT_STRING(embedPrivate->mWindow->mLinkMessage);
    retval = strdup(embedString);
}

return retval;



Why do you not pass the link message string as an argument to the 
handler in the first place?

Since for OPEN_URI, you do:

 gtk_signal_emit(GTK_OBJECT(mOwner->mOwningWidget), 
moz_embed_signals[OPEN_URI], specString.get(), &return_val);



What am I missing?

Thanks,
Philippe