Make Document.createAttribute lowercase the name

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
@@ skipping 4996 matching lines @@
 Document* Document::contextDocument() {
   if (m_contextDocument)
     return m_contextDocument;
   if (m_frame)
     return this;
   return nullptr;
 }
 
 Attr* Document::createAttribute(const AtomicString& name,
                                 ExceptionState& exceptionState) {
-  if (isHTMLDocument() && name != name.lower())
-    UseCounter::count(*this,
-                      UseCounter::HTMLDocumentCreateAttributeNameNotLowercase);
-  return createAttributeNS(nullAtom, name, exceptionState, true);
+  return createAttributeNS(nullAtom, convertLocalName(name), exceptionState,
+                           true);
 }
 
 Attr* Document::createAttributeNS(const AtomicString& namespaceURI,
                                   const AtomicString& qualifiedName,
                                   ExceptionState& exceptionState,
                                   bool shouldIgnoreNamespaceChecks) {
   AtomicString prefix, localName;
   if (!parseQualifiedName(qualifiedName, prefix, localName, exceptionState))
     return nullptr;
 
@@ skipping 1407 matching lines @@
 }
 
 void showLiveDocumentInstances() {
   WeakDocumentSet& set = liveDocumentSet();
   fprintf(stderr, "There are %u documents currently alive:\n", set.size());
   for (Document* document : set)
     fprintf(stderr, "- Document %p URL: %s\n", document,
             document->url().getString().utf8().data());
 }
 #endif