better NS_IMPL_ISUPPORTS usage (to be consistent with others)

widget/src/gtk/nsBidiKeyboard.cpp

@@ -22,9 +22,8 @@
 
 #include "nsBidiKeyboard.h"
 
-static NS_DEFINE_IID(kIBidiKeyboardIID, NS_IBIDIKEYBOARD_IID);
+NS_IMPL_ISUPPORTS(nsBidiKeyboard, NS_GET_IID(nsIBidiKeyboard))
 
-NS_IMPL_ISUPPORTS1(nsBidiKeyboard, nsBidiKeyboard)
 nsBidiKeyboard::nsBidiKeyboard() : nsIBidiKeyboard()
 {
   NS_INIT_REFCNT();