HTMLDialogElement#showModal() should ignore unfocusable elements with [autofocus]

third_party/WebKit/Source/core/html/HTMLDialogElement.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 37 matching lines @@
         if (isHTMLDialogElement(*node))
             next = NodeTraversal::nextSkippingChildren(*node, dialog);
         else
             next = NodeTraversal::next(*node, dialog);
 
         if (!node->isElementNode())
             continue;
         Element* element = toElement(node);
         if (element->isFormControlElement()) {
             HTMLFormControlElement* control = toHTMLFormControlElement(node);
-            if (control->isAutofocusable()) {
+            if (control->isAutofocusable() && control->isFocusable()) {
                 control->focus();
                 return;
             }
         }
         if (!focusableDescendant && element->isFocusable())
             focusableDescendant = element;
     }
 
     if (focusableDescendant) {
         focusableDescendant->focus();
@@ skipping 132 matching lines @@
 {
     if (event->type() == EventTypeNames::cancel) {
         closeDialog();
         event->setDefaultHandled();
         return;
     }
     HTMLElement::defaultEventHandler(event);
 }
 
 } // namespace blink