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

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

Index: third_party/WebKit/Source/core/html/forms/InputType.cpp
diff --git a/third_party/WebKit/Source/core/html/forms/InputType.cpp b/third_party/WebKit/Source/core/html/forms/InputType.cpp
index 5f1912e55467fc60351dfed2438986e64a059d01..aaa270d96df825cf200de112143d280bfe004a32 100644
--- a/third_party/WebKit/Source/core/html/forms/InputType.cpp
+++ b/third_party/WebKit/Source/core/html/forms/InputType.cpp
@@ -136,7 +136,8 @@ 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;
 }