Adding Element.closest() API

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 023c8502de685fe77ee043a506c635694f3f268a..5877c81cc497b088872d9e214e07f35ecc22bff3 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -2532,6 +2532,14 @@ bool Element::matches(const String& selectors, ExceptionState& exceptionState)
     return selectorQuery->matches(*this);
 }
 
+Element* Element::closest(const String& selectors, ExceptionState& exceptionState)
+{
+    SelectorQuery* selectorQuery = document().selectorQueryCache().add(AtomicString(selectors), document(), exceptionState);
+    if (!selectorQuery)
+        return nullptr;
+    return selectorQuery->closest(*this);
+}
+
 DOMTokenList& Element::classList()
 {
     ElementRareData& rareData = ensureElementRareData();