Changed the default value of tabIndex of <fieldset> and <output> to be -1 as they are non-focusable…

third_party/WebKit/Source/core/html/HTMLFieldSetElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLFieldSetElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLFieldSetElement.cpp b/third_party/WebKit/Source/core/html/HTMLFieldSetElement.cpp
index b91e769ab53228dea794fe0546ba9ac7c20ff967..febe4afe2894b08c8eccf5b39715d81d9c5c40e6 100644
--- a/third_party/WebKit/Source/core/html/HTMLFieldSetElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLFieldSetElement.cpp
@@ -153,4 +153,9 @@ const FormAssociatedElement::List& HTMLFieldSetElement::associatedElements() con
     return m_associatedElements;
 }
 
+short HTMLFieldSetElement::tabIndex() const
+{
+    return -1;

[tkent, 2016/09/01 23:27:24]

We should return HTMLElement::tabIndex().
  e.g. <fieldset tabindex=1> should return 1 for tabIndex.

[lunalu1, 2016/09/02 01:07:38]

Done.

+}
+
 } // namespace blink