bool FrameLoader::subframeIsLoading() const
{
    for (Frame* child = m_frame->tree()->lastChild(); child; child = child->tree()->previousSibling()) {
        FrameLoader* childLoader = child->loader();
        DocumentLoader* documentLoader = childLoader->documentLoader();
        if (documentLoader && documentLoader->isLoadingInAPISense())
            return true;
        documentLoader = childLoader->provisionalDocumentLoader();
        if (documentLoader && documentLoader->isLoadingInAPISense())
            return true;
    }
    return false;
}

Unknown