Count element name validity per DOM versus HTML parsing.

third_party/WebKit/Source/core/dom/DOMImplementation.cpp

Index: third_party/WebKit/Source/core/dom/DOMImplementation.cpp
diff --git a/third_party/WebKit/Source/core/dom/DOMImplementation.cpp b/third_party/WebKit/Source/core/dom/DOMImplementation.cpp
index 8aab9bbbe43126a637cd62de820b90afeb2ff968..54d9e626d54e0a31dc9f67cac859798f35fd5bd3 100644
--- a/third_party/WebKit/Source/core/dom/DOMImplementation.cpp
+++ b/third_party/WebKit/Source/core/dom/DOMImplementation.cpp
@@ -77,6 +77,7 @@ DocumentType* DOMImplementation::createDocumentType(
 }
 
 XMLDocument* DOMImplementation::createDocument(
+    const LocalDOMWindow* window,
     const AtomicString& namespace_uri,
     const AtomicString& qualified_name,
     DocumentType* doctype,
@@ -98,8 +99,8 @@ XMLDocument* DOMImplementation::createDocument(
 
   Node* document_element = nullptr;
   if (!qualified_name.IsEmpty()) {
-    document_element =
-        doc->createElementNS(namespace_uri, qualified_name, exception_state);
+    document_element = doc->createElementNS(window, namespace_uri,
+                                            qualified_name, exception_state);
     if (exception_state.HadException())
       return nullptr;
   }