Notify the client of a document access even if document.write is used. Modal dialogs can usually delay the notification from reaching the client. notifyIfInitialDocumentAccessed is used to skip the timer if a dialog is shown (via PageGroupLoadDeferrer), but it shouldn't care whether the FrameLoader is still in the initial empty document state. BUG=322959 TEST=See bug for repro steps. Review URL: https://codereview.chromium.org/86413004