Notify the HTMLDocumentParser on document element available

third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp

Index: third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
diff --git a/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp b/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
index e37795ac23d1f47a5d024f958271a9cc5993463d..a8511a0fa78abc38215c43e8df81deb2ca79ed8d 100644
--- a/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
+++ b/third_party/WebKit/Source/core/xml/parser/XMLDocumentParser.cpp
@@ -1022,10 +1022,11 @@ void XMLDocumentParser::startElementNs(const AtomicString& localName, const Atom
     else
         pushCurrentNode(newElement);
 
-    if (isHTMLHtmlElement(*newElement))
+    // Note: |insertedByParser| will perform dispatching if this is an
+    // HTMLHtmlElement.
+    if (isHTMLHtmlElement(*newElement) && isFirstElement) {
         toHTMLHtmlElement(*newElement).insertedByParser();
-
-    if (!m_parsingFragment && isFirstElement && document()->frame()) {
+    } else if (!m_parsingFragment && isFirstElement && document()->frame()) {
         document()->frame()->loader().dispatchDocumentElementAvailable();
         document()->frame()->loader().runScriptsAtDocumentElementAvailable();
         // runScriptsAtDocumentElementAvailable might have invalidated the document.