addShadowRoot    1739 Source/core/dom/Element.cpp     return PassRefPtr<ShadowRoot>(ensureShadow().addShadowRoot(*this, ShadowRoot::AuthorShadowRoot));
addShadowRoot    1773 Source/core/dom/Element.cpp     ShadowRoot& shadowRoot = ensureShadow().addShadowRoot(*this, ShadowRoot::UserAgentShadowRoot);
addShadowRoot      53 Source/core/dom/shadow/ElementShadow.h     ShadowRoot& addShadowRoot(Element& shadowHost, ShadowRoot::ShadowRootType);