Input type file should return ButtonRole.

Source/modules/accessibility/AXNodeObject.cpp

 /*
 * Copyright (C) 2012, Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 1516 matching lines @@
 }
 
 Element* AXNodeObject::actionElement() const
 {
     Node* node = this->node();
     if (!node)
         return 0;
 
     if (isHTMLInputElement(*node)) {
         HTMLInputElement& input = toHTMLInputElement(*node);
-        if (!input.isDisabledFormControl() && (isCheckboxOrRadio() || input.isTextButton()))
+        if (!input.isDisabledFormControl() && (isCheckboxOrRadio() || input.isTextButton()
+            || input.type() == InputTypeNames::file))
             return &input;
     } else if (isHTMLButtonElement(*node)) {
         return toElement(node);
     }
 
-    if (isFileUploadButton())
-        return toElement(node);
-
     if (AXObject::isARIAInput(ariaRoleAttribute()))
         return toElement(node);
 
     if (isImageButton())
         return toElement(node);
 
     if (isHTMLSelectElement(*node))
         return toElement(node);
 
     switch (roleValue()) {
@@ skipping 269 matching lines @@
     float range = maxValueForRange() - minValueForRange();
     float value = valueForRange();
 
     value += range * (percentChange / 100);
     setValue(String::number(value));
 
     axObjectCache()->postNotification(node(), AXObjectCacheImpl::AXValueChanged, true);
 }
 
 } // namespace blink