Stop clamping tabIndex to short range

third_party/WebKit/Source/core/html/HTMLSlotElement.h

 /*
  * Copyright (C) 2015 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 61 matching lines @@
   void lazyReattachDistributedNodesIfNeeded();
 
   void attachLayoutTree(const AttachContext& = AttachContext()) final;
   void detachLayoutTree(const AttachContext& = AttachContext()) final;
 
   void attributeChanged(const QualifiedName&,
                         const AtomicString& oldValue,
                         const AtomicString& newValue,
                         AttributeModificationReason = ModifiedDirectly) final;
 
-  short tabIndex() const override;
+  int tabIndex() const override;
   AtomicString name() const;
 
   // This method can be slow because this has to traverse the children of a
   // shadow host.  This method should be used only when m_assignedNodes is
   // dirty.  e.g. To detect a slotchange event in DOM mutations.
   bool hasAssignedNodesSlow() const;
   bool findHostChildWithSameSlotName() const;
 
   void enqueueSlotChangeEvent();
 
@@ skipping 16 matching lines @@
   HeapVector<Member<Node>> m_assignedNodes;
   HeapVector<Member<Node>> m_distributedNodes;
   HeapVector<Member<Node>> m_oldDistributedNodes;
   HeapHashMap<Member<const Node>, size_t> m_distributedIndices;
   bool m_slotchangeEventEnqueued = false;
 };
 
 }  // namespace blink
 
 #endif  // HTMLSlotElement_h