Count element name validity per DOM versus HTML parsing.

third_party/WebKit/Source/core/dom/Document.h

Index: third_party/WebKit/Source/core/dom/Document.h
diff --git a/third_party/WebKit/Source/core/dom/Document.h b/third_party/WebKit/Source/core/dom/Document.h
index 14066c9866d81311f5a15e7d3c6af0f380dc92a9..bacf0dd2ee32b1a4ee7d6923585af839ac20bafa 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -317,8 +317,9 @@ class CORE_EXPORT Document : public ContainerNode,
 
   Location* location() const;
 
-  Element* createElement(const AtomicString& name,
-                         ExceptionState& = ASSERT_NO_EXCEPTION);
+  Element* createElement(const LocalDOMWindow*,
+                         const AtomicString& name,
+                         ExceptionState&);
   DocumentFragment* createDocumentFragment();
   Text* createTextNode(const String& data);
   Comment* createComment(const String& data);
@@ -332,7 +333,8 @@ class CORE_EXPORT Document : public ContainerNode,
                           ExceptionState&,
                           bool should_ignore_namespace_checks = false);
   Node* importNode(Node* imported_node, bool deep, ExceptionState&);
-  Element* createElementNS(const AtomicString& namespace_uri,
+  Element* createElementNS(const LocalDOMWindow*,
+                           const AtomicString& namespace_uri,
                            const AtomicString& qualified_name,
                            ExceptionState&);
   Element* createElement(const QualifiedName&, CreateElementFlags);
@@ -1139,10 +1141,17 @@ class CORE_EXPORT Document : public ContainerNode,
 
   TextAutosizer* GetTextAutosizer();
 
-  Element* createElement(const AtomicString& local_name,
+  Element* createElement(
+      const AtomicString& local_name,
+      ExceptionState& exception_state = ASSERT_NO_EXCEPTION) {
+    return createElement(nullptr, local_name, exception_state);
+  }
+  Element* createElement(const LocalDOMWindow*,
+                         const AtomicString& local_name,
                          const StringOrDictionary&,
                          ExceptionState& = ASSERT_NO_EXCEPTION);
-  Element* createElementNS(const AtomicString& namespace_uri,
+  Element* createElementNS(const LocalDOMWindow*,
+                           const AtomicString& namespace_uri,
                            const AtomicString& qualified_name,
                            const StringOrDictionary&,
                            ExceptionState&);