Make anchors mouse-focusable

Source/core/dom/Element.h

Index: Source/core/dom/Element.h
diff --git a/Source/core/dom/Element.h b/Source/core/dom/Element.h
index 8136281da8dc93da17bacc4be952a70105514f63..530c3abea4b1d0cd572573266ae7736743f01af7 100644
--- a/Source/core/dom/Element.h
+++ b/Source/core/dom/Element.h
@@ -375,6 +375,7 @@ public:
     bool isFocusable() const;
     virtual bool isKeyboardFocusable() const;
     virtual bool isMouseFocusable() const;
+    virtual void willCallDefaultEventHandler(const Event&) OVERRIDE FINAL;
     virtual void dispatchFocusEvent(Element* oldFocusedElement, FocusType);
     virtual void dispatchBlurEvent(Element* newFocusedElement);
     void dispatchFocusInEvent(const AtomicString& eventType, Element* oldFocusedElement);
@@ -530,6 +531,10 @@ protected:
     // e.g., HTMLOptionElement.
     virtual bool rendererIsFocusable() const;
 
+    // These methods are overridden by subclasses whose default focus appearance should not remain hidden on mouse focus.
+    virtual bool wasFocusedByMouse() const { return false; }
+    virtual void setWasFocusedByMouse(bool) { }
+
     // classAttributeChanged() exists to share code between
     // parseAttribute (called via setAttribute()) and
     // svgAttributeChanged (called when element.className.baseValue is set)