B2G/gecko/browser/components/tabview/favicons.js
// Gets the "favicon link URI" for the given xul:tab, or null if unavailable.
Gets the "favicon link URI" for the given xul:tab, or null if unavailable.
Gets the " favicon link URI " for the given xul : tab or null if unavailable .
function FavIcons_getFavIconUrlForTab(tab, callback) {
    this._isImageDocument(tab, function (isImageDoc) {
      if (isImageDoc) {
        callback(tab.pinned ? tab.image : null);
      } else {
        this._getFavIconForNonImageDocument(tab, callback);
      }
    }.bind(this));
  }
function FavIcons_getFavIconUrlForTab ( tab , callback ) { this . _isImageDocument ( tab , function ( isImageDoc ) { if ( isImageDoc ) { callback ( tab . pinned ? tab . image : null ) ; } else { this . _getFavIconForNonImageDocument ( tab , callback ) ; } } . bind ( this ) ) ; }
Gets the "favicon link URI" for the given xul:tab, or null if unavailable.
Gets the " favicon link URI " for the given xul : tab or null if unavailable .