install() {
    var r = this.replacer_ = new PropertyReplacer();
    var self = this;
    r.set(util, 'goTo', function(url) {
      self.goToUrl_ = url;
    });
    r.set(util, 'openerGoTo', function(url) {
      self.openerGoToUrl_ = url;
    });
    r.set(util, 'hasOpener', function() {
      return !!self.hasOpener_;
    });
    r.set(util, 'close', function(window) {
      self.closedWindow_ = window;
    });
    r.set(util, 'popup', function(url) {
      self.popupUrl_ = url;
    });
    r.set(util, 'open', function(url, windowName) {
      self.openUrl_ = url;
      self.windowName_ = windowName;
    });
    r.set(util, 'replaceHistoryState', function(state, title, url) {
      self.lastHistoryState_ = state;
      self.lastHistoryTitle_ = title;
      self.lastHistoryUrl_ = url;
    });
    return this;
  }
Installs the fake utils.
@return {!FakeUtil} The fake util.