DevTools: Move DOMNode.appropriateSelectorFor() into DOMPresentationUtil.

LayoutTests/inspector/layer-compositing-reasons.html

Index: LayoutTests/inspector/layer-compositing-reasons.html
diff --git a/LayoutTests/inspector/layer-compositing-reasons.html b/LayoutTests/inspector/layer-compositing-reasons.html
index ec34d69402c7dafc8f3fa08cd0334e9cfdc5de51..1b82dc86e147b72306142ff6b7adddfca8d84200 100644
--- a/LayoutTests/inspector/layer-compositing-reasons.html
+++ b/LayoutTests/inspector/layer-compositing-reasons.html
@@ -24,7 +24,7 @@ function test()
         layer.requestCompositingReasons(function(reasons)
         {
             var node = WebInspector.domAgent.nodeForId(layer.nodeIdForSelfOrAncestor());
-            var label = node.appropriateSelectorFor(false);
+            var label = WebInspector.DOMPresentationUtils.appropriateSelectorFor(node, false);
             InspectorTest.addResult("Compositing reasons for " + label + ": " + reasons.sort().join(","));
             callback();
         });