(ViewCSSImp::expandBinding) : Separate from ViewCSSImp::updateStyleRules
[XBL2] Upon the completion of a binding document loading, reschedule the expansion of the binding document

(DocumentImp::setReadyState) : Reschedule a selector matching, which indirectly reschedule the expansion of binding documents
(ViewCSSImp::constructComputedStyle) : Check the status of the shadow tree
(ViewCSSImp::expandBinding, ViewCSSImp::updateStyleRules) : Refine
(HTMLElementImp::generateShadowContent, HTMLInputElementImp::generateShadowContent) : Refine