Make anchors mouse-focusable

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index 0253525e3481a27a63fbedffb0bd68d3fdddb7af..4ddf601f274d422f5970fa857f7bb100efaa49b2 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -2126,6 +2126,12 @@ bool Element::supportsFocus() const
         || supportsSpatialNavigationFocus();
 }
 
+bool Element::shouldHaveFocusAppearance() const
+{
+    ASSERT(focused());
+    return shouldShowFocusRingOnMouseFocus() || !shouldHideFocusRingOnMouseFocus();
+}
+
 bool Element::supportsSpatialNavigationFocus() const
 {
     // This function checks whether the element satisfies the extended criteria
@@ -2164,8 +2170,24 @@ bool Element::isMouseFocusable() const
     return isFocusable();
 }
 
-void Element::dispatchFocusEvent(Element* oldFocusedElement, FocusType)
+void Element::willCallDefaultEventHandler(const Event& event)
+{
+    if (!event.isKeyboardEvent() || event.type() != EventTypeNames::keydown)
+        return;
+    if (!shouldHideFocusRingOnMouseFocus())
+        return;
+
+    ensureUniqueElementData().m_shouldHideFocusRingOnMouseFocus = false;
+    // Focus changes could affect the focus ring appearance if the focus ring is not shown by default on mouse focus.
+    if (renderer())
+        renderer()->setShouldDoFullPaintInvalidation(true);
+}
+
+void Element::dispatchFocusEvent(Element* oldFocusedElement, FocusType type)
 {
+    if (type != FocusTypePage && !shouldShowFocusRingOnMouseFocus())
+        ensureUniqueElementData().m_shouldHideFocusRingOnMouseFocus = type == FocusTypeMouse;
+
     RefPtrWillBeRawPtr<FocusEvent> event = FocusEvent::create(EventTypeNames::focus, false, false, document().domWindow(), 0, oldFocusedElement);
     EventDispatcher::dispatchEvent(this, FocusEventDispatchMediator::create(event.release()));
 }