[SVG2] Add tabindex handling in svg.

Source/core/html/HTMLElement.h

Index: Source/core/html/HTMLElement.h
diff --git a/Source/core/html/HTMLElement.h b/Source/core/html/HTMLElement.h
index 7dbe460d2f93808d7d8e297a8f2201d47697b9dc..90e1ecd7295c6fa7afd85482bfe948ae938f1b27 100644
--- a/Source/core/html/HTMLElement.h
+++ b/Source/core/html/HTMLElement.h
@@ -43,15 +43,12 @@ public:
     static PassRefPtr<HTMLElement> create(const QualifiedName& tagName, Document&);
 
     virtual String title() const OVERRIDE FINAL;
-
     virtual short tabIndex() const OVERRIDE;
-    void setTabIndex(int);
 
     void setInnerText(const String&, ExceptionState&);
     void setOuterText(const String&, ExceptionState&);
 
     virtual bool hasCustomFocusLogic() const;
-    virtual bool supportsFocus() const OVERRIDE;
 
     String contentEditable() const;
     void setContentEditable(const String&, ExceptionState&);
@@ -126,7 +123,6 @@ private:
     TranslateAttributeMode translateAttributeMode() const;
 
     void handleKeypressEvent(KeyboardEvent*);
-    bool supportsSpatialNavigationFocus() const;
 };
 
 DEFINE_ELEMENT_TYPE_CASTS(HTMLElement, isHTMLElement());