Introduce "navigation target classification" for spatial navigation

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 2770150fd8e6e417c6bdb39cafd9fa3ce5128829..c8fd776c97c367890d1632ba5b88807dd96fb142 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -108,7 +108,6 @@
 #include "core/page/FocusController.h"
 #include "core/page/Page.h"
 #include "core/page/PointerLockController.h"
-#include "core/page/SpatialNavigation.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderTextFragment.h"
 #include "core/rendering/RenderView.h"
@@ -2220,31 +2219,7 @@ bool Element::supportsFocus() const
     // But supportsFocus must return true when the element is editable, or else
     // it won't be focusable. Furthermore, supportsFocus cannot just return true
     // always or else tabIndex() will change for all HTML elements.
-    return hasElementFlag(TabIndexWasSetExplicitly) || (hasEditableStyle() && parentNode() && !parentNode()->hasEditableStyle())
-        || supportsSpatialNavigationFocus();
-}
-
-bool Element::supportsSpatialNavigationFocus() const
-{
-    // This function checks whether the element satisfies the extended criteria
-    // for the element to be focusable, introduced by spatial navigation feature,
-    // i.e. checks if click or keyboard event handler is specified.
-    // This is the way to make it possible to navigate to (focus) elements
-    // which web designer meant for being active (made them respond to click events).
-
-    if (!isSpatialNavigationEnabled(document().frame()))
-        return false;
-    if (hasEventListeners(EventTypeNames::click)
-        || hasEventListeners(EventTypeNames::keydown)
-        || hasEventListeners(EventTypeNames::keypress)
-        || hasEventListeners(EventTypeNames::keyup))
-        return true;
-    if (!isSVGElement())
-        return false;
-    return (hasEventListeners(EventTypeNames::focus)
-        || hasEventListeners(EventTypeNames::blur)
-        || hasEventListeners(EventTypeNames::focusin)
-        || hasEventListeners(EventTypeNames::focusout));
+    return hasElementFlag(TabIndexWasSetExplicitly) || (hasEditableStyle() && parentNode() && !parentNode()->hasEditableStyle());
 }
 
 bool Element::isFocusable() const