Input type check comparision should be an ASCII case-insensitive match.

third_party/WebKit/Source/core/html/forms/InputType.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All
  * rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  * Copyright (C) 2009, 2010, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2012 Samsung Electronics. All rights reserved.
@@ skipping 118 matching lines @@
 }
 
 InputType* InputType::CreateText(HTMLInputElement& element) {
   return TextInputType::Create(element);
 }
 
 const AtomicString& InputType::NormalizeTypeName(
     const AtomicString& type_name) {
   if (type_name.IsEmpty())
     return InputTypeNames::text;
-  InputTypeFactoryMap::const_iterator it = FactoryMap()->find(type_name);
+  InputTypeFactoryMap::const_iterator it =
+      FactoryMap()->find(AtomicString(type_name.Ascii().data()));

[tkent, 2017/06/05 00:27:50]

As the try bots showed failures, this change is wrong.  We should pass
type_name.LowerASCII() here, and should remove CaseFoldingHash from
InputTypeFactoryMap definition.

Also, we should add a test case for crbug.com/728515

   return it == FactoryMap()->end() ? InputTypeNames::text : it->key;
 }
 
 InputType::~InputType() {}
 
 DEFINE_TRACE(InputType) {
   visitor->Trace(element_);
 }
 
 bool InputType::IsTextField() const {
@@ skipping 765 matching lines @@
 
 void InputType::AddWarningToConsole(const char* message_format,
                                     const String& value) const {
   GetElement().GetDocument().AddConsoleMessage(ConsoleMessage::Create(
       kRenderingMessageSource, kWarningMessageLevel,
       String::Format(message_format,
                      JSONValue::QuoteString(value).Utf8().data())));
 }
 
 }  // namespace blink