--- a/toolkit/components/places/public/nsINavHistoryService.idl
+++ b/toolkit/components/places/public/nsINavHistoryService.idl
@@ -739,19 +739,16 @@ interface nsINavHistoryObserver : nsISup
    * specified in the <title> tag of the page).
    *
    * Note that there is a difference between an empty title and a NULL title.
    * An empty string means that somebody specifically set the title to be
    * nothing. NULL means nobody set it. From C++: use IsVoid() and SetIsVoid()
    * to see whether an empty string is "null" or not (it will always be an
    * empty string in either case).
    *
-   * @param aUserTitleChanged Is true if the user title was the thing that was
-   *                          changed. If false, that means the "real" page
-   *                          title was changed instead.
    */
   void onTitleChanged(in nsIURI aURI, in AString aPageTitle);
 
   /**
    * This page and all of its visits are being deleted. Note: the page may not
    * necessarily have actually existed for this function to be called.
    *
    * Delete notifications are only 99.99% accurate. Batch delete operations

--- a/toolkit/components/places/tests/unit/test_expiration.js
+++ b/toolkit/components/places/tests/unit/test_expiration.js
@@ -69,17 +69,17 @@ try {
 // create and add history observer
 var observer = {
   onBeginUpdateBatch: function() {
   },
   onEndUpdateBatch: function() {
   },
   onVisit: function(aURI, aVisitID, aTime, aSessionID, aReferringID, aTransitionType) {
   },
-  onTitleChanged: function(aURI, aPageTitle, aUserTitle, aUserTitleChanged) {
+  onTitleChanged: function(aURI, aPageTitle) {
   },
   onDeleteURI: function(aURI) {
   },
   onClearHistory: function() {
     this.historyCleared = true;
   },
   onPageChanged: function(aURI, aWhat, aValue) {
   },