CSS style sharing system should work with inline style declarations Currently in bool CSSStyleSelector::canShareStyleWithElement(Node* n) there is an explicit check for !s->inlineStyleDecl() This makes style sharing much less useful for SVG, since sooo much of SVG uses style="" for setting styles on elements. Ugly, I know, but SVGs are generally created by editors, and editors often just spit out style tags.
This is very hard to do, since the CSSStyleDeclaration exposed by inline style is accessible from JS.