Use ASCII-caseless matching for attribute names.

third_party/WebKit/Source/platform/wtf/text/WTFString.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010, 2012 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2007-2009 Torch Mobile, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 276 matching lines @@
     return String();
   return impl_->LowerUnicode(locale_identifier);
 }
 
 String String::UpperUnicode(const AtomicString& locale_identifier) const {
   if (!impl_)
     return String();
   return impl_->UpperUnicode(locale_identifier);
 }
 
+String String::LowerASCII() const {
+  if (!impl_)
+    return String();
+  return impl_->LowerASCII();
+}
+
 String String::UpperASCII() const {
   if (!impl_)
     return String();
   return impl_->UpperASCII();
 }
 
 String String::StripWhiteSpace() const {
   if (!impl_)
     return String();
   return impl_->StripWhiteSpace();
@@ skipping 517 matching lines @@
   return out << '"';
 }
 
 #ifndef NDEBUG
 void String::Show() const {
   DataLogF("%s\n", AsciiDebug(Impl()).Data());
 }
 #endif
 
 }  // namespace WTF