##加载完毕数据到开始DOM树的创建
WebCore::RenderObject::addChild()
WebCore::RenderBlock::addChildIgnoringAnonymousColumnBlocks
WebCore::RenderBlock::addChildIgnoringContinuation
WebCore::RenderBlock::addChild
WebCore::NodeRendererFactory::createRendererIfNeeded()
WebCore::Node::createRendererIfNeeded()
WebCore::Element::attach()
WebCore::HTMLConstructionSite::attach
WebCore::HTMLConstructionSite::insertHTMLHtmlStartTagBeforeHTML
>>插入标签
>>HTMLElementStack m_openElements; //将创建的元素压入堆栈,但压入堆栈之前进行attach()操作
m_openElements.pushHTMLHtmlElement(attach(m_attachmentRoot, element.get()));
# WebCore::HTMLTreeBuilder::processStartTag(WebCo