Avoid computing navigation data for nodes in the wrong navigation direction

Source/core/page/SpatialNavigation.cpp

 /*
  * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2009 Antonio Gomes <tonikitoo@webkit.org>
  *
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
@@ skipping 106 matching lines @@
 
 // Return true if rect |a| is on the right of |b|. False otherwise.
 // For overlapping rects, |a| is considered to be on the right of |b|
 // if both edges of |a| are on the right of the respective ones of |b|
 static inline bool rightOf(const LayoutRect& a, const LayoutRect& b)
 {
     return a.x() >= b.maxX()
         || (a.x() >= b.x() && a.maxX() > b.maxX() && a.y() < b.maxY() && a.maxY() > b.y());
 }
 
-static bool isRectInDirection(WebFocusType type, const LayoutRect& curRect, const LayoutRect& targetRect)
+bool isRectInDirection(WebFocusType type, const LayoutRect& curRect, const LayoutRect& targetRect)
 {
     switch (type) {
     case WebFocusTypeLeft:
         return rightOf(curRect, targetRect);
     case WebFocusTypeRight:
         return rightOf(targetRect, curRect);
     case WebFocusTypeUp:
         return below(curRect, targetRect);
     case WebFocusTypeDown:
         return below(targetRect, curRect);
@@ skipping 484 matching lines @@
     LayoutRect rect = virtualRectForDirection(type, rectToAbsoluteCoordinates(area.document().frame(), area.computeRect(area.imageElement()->layoutObject())), 1);
     return rect;
 }
 
 HTMLFrameOwnerElement* frameOwnerElement(FocusCandidate& candidate)
 {
     return candidate.isFrameOwnerElement() ? toHTMLFrameOwnerElement(candidate.visibleNode) : nullptr;
 };
 
 } // namespace blink