nsIRefreshURI in Firefox 3.5

 Cancels all timer loads.

 Loads a URI immediately as if it were a refresh.

 @param aURI The URI to refresh.
 @param aMillis The number of milliseconds by which this refresh would
                be delayed if it were not being forced.
 @param aMetaRefresh Flag to indicate if this is a meta refresh.

 Load a uri after waiting for aMillis milliseconds. If the docshell
 is busy loading a page currently, the refresh request will be
 queued and executed when the current load finishes. 

 @param aUri The uri to refresh.
 @param aMillis The number of milliseconds to wait.
 @param aRepeat Flag to indicate if the uri is to be 
                repeatedly refreshed every aMillis milliseconds.
 @param aMetaRefresh Flag to indicate if this is a Meta refresh.

 Checks the passed in channel to see if there is a refresh header, 
 if there is, will setup a timer to refresh the uri found
 in the header. If docshell is busy loading a page currently, the
 request will be queued and executed when the current page 
 finishes loading. 

 Returns the NS_REFRESHURI_HEADER_FOUND success code if a refresh
 header was found and successfully setup.

 @param aChannel The channel to be parsed. 

 Parses the passed in header string and sets up a refreshURI if
 a "refresh" header is found. If docshell is busy loading a page 
 currently, the request will be queued and executed when 
 the current page finishes loading. 

 @param aBaseURI base URI to resolve refresh uri with.
 @param aHeader  The meta refresh header string.