nsICharsetResolver Interface

 notifyResolvedCharset

 some implementations may request that they be notified when the
 charset is actually detected. 

 @param charset the detected charset
 @param closure the closre returned by detectCharset() above

void notifyResolvedCharset(in ACString charset, in nsISupports closure)

 Called to resolve the charset that should be used for parsing the
 document being loaded from aChannel.

 If the charset cannot be resolved, but the implementation of
 nsICharsetResolver wants to be notified of the final resolved charset
 when one is available, it can set wantCharset to true.  If this is done,
 the caller of requestCharset is responsible for calling
 notifyResovedCharset and passing it the final resolved charset and the
 closure that requestCharset set.
 
 @param aWebNavigation the nsIWebNavigation the document is being loaded
                       in.  May be null.
 @param aChannel the channel the document is coming in from.
 @param aWantCharset gets set to true if notifyResolvedCharset should be
                     called with the given closure object.
 @param aClosure a resulting object which should be passed
                 to notifyResolvedCharset if wantCharset is set to
                 true.
 @returns the resolved charset, or the empty string if no
          charset could be determined.

ACString requestCharset(in nsIWebNavigation aWebNavigation, in nsIChannel aChannel, out boolean aWantCharset, out nsISupports aClosure)