Clean up code duplication of isAtShadowBoundary()

Source/core/css/resolver/StyleAdjuster.cpp

Index: Source/core/css/resolver/StyleAdjuster.cpp
diff --git a/Source/core/css/resolver/StyleAdjuster.cpp b/Source/core/css/resolver/StyleAdjuster.cpp
index 01b0857a3e2e95ba27a5e8c6f42dbe2f07299594..dc278e60be6e74766c7a3126440e13ee641804c2 100644
--- a/Source/core/css/resolver/StyleAdjuster.cpp
+++ b/Source/core/css/resolver/StyleAdjuster.cpp
@@ -56,17 +56,6 @@ namespace blink {
 
 using namespace HTMLNames;
 
-// FIXME: This is duplicated with StyleResolver.cpp
-// Perhaps this should move onto ElementResolveContext or even Element?
-static inline bool isAtShadowBoundary(const Element* element)
-{
-    if (!element)
-        return false;
-    ContainerNode* parentNode = element->parentNode();
-    return parentNode && parentNode->isShadowRoot();
-}
-
-
 static EDisplay equivalentBlockDisplay(EDisplay display, bool isFloating, bool strictParsing)
 {
     switch (display) {