[Editing][CodeHealth] Make Node::rootEditableElement static

third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp

Index: third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp
diff --git a/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp b/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp
index 0aff29dd52e776368a9076b48382df6dbbb1342b..b10b14cf68218382e9ce1902b321cfb72066b56e 100644
--- a/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp
+++ b/third_party/WebKit/Source/modules/accessibility/AXObjectCacheImpl.cpp
@@ -1075,7 +1075,7 @@ bool AXObjectCacheImpl::inlineTextBoxAccessibilityEnabled()
 
 const Element* AXObjectCacheImpl::rootAXEditableElement(const Node* node)
 {
-    const Element* result = node->rootEditableElement();
+    const Element* result = rootEditableElement(*node);
     const Element* element = node->isElementNode() ? toElement(node) : node->parentElement();
 
     for (; element; element = element->parentElement()) {