Test suite fails with accessibility features disabled

When Qt is configured with --no-accessibility, building qtwebengine fails like this:

{{
linking minimal
compiling /home/teamcity/worker/poky/build/tmp-glibc/work/aarch64-nepos-linux/qtwebengine/5.9.2+gitAUTOINC+c11c2c8981_cfe8c60903-r0/git/examples/webenginewidgets/demobrowser/bookmarks.cpp
/home/teamcity/worker/poky/build/tmp-glibc/work/aarch64-nepos-linux/qtwebengine/5.9.2+gitAUTOINC+c11c2c8981_cfe8c60903-r0/git/tests/auto/widgets/qwebengineaccessibility/tst_qwebengineaccessibility.cpp: In member function 'void tst_QWebEngineAccessibility::noPage()':
/home/teamcity/worker/poky/build/tmp-glibc/work/aarch64-nepos-linux/qtwebengine/5.9.2+gitAUTOINC+c11c2c8981_cfe8c60903-r0/git/tests/auto/widgets/qwebengineaccessibility/tst_qwebengineaccessibility.cpp:73:34: error: 'QAccessible' has not been declared
QAccessibleInterface *view = QAccessible::queryAccessibleInterface(&webView);
^~~~~~~~~~~
}}