Devtools [LayoutEditor]: Show medias for the rules with the same selectors

Source/core/inspector/InspectorOverlayPage.html

Index: Source/core/inspector/InspectorOverlayPage.html
diff --git a/Source/core/inspector/InspectorOverlayPage.html b/Source/core/inspector/InspectorOverlayPage.html
index ff0df28eb26e25f1b1519539a468d3087cb60e98..969da8e782b8f4eb40d2d8b445e0c5520b2d5ec6 100644
--- a/Source/core/inspector/InspectorOverlayPage.html
+++ b/Source/core/inspector/InspectorOverlayPage.html
@@ -835,7 +835,8 @@ function showSelectorTooltip()
     tooltipElement.style.left = "100px";
     tooltipElement.style.top = "100px";
     var selectorInfo = JSON.parse(InspectorOverlayHost.currentSelectorInfo());
-    tooltipElement.textContent = selectorInfo.selector;
+    var medias = selectorInfo.medias ? selectorInfo.medias.map(function(media) {return "@media " + media + ""}) : "";
+    tooltipElement.textContent = (medias ? medias.join(", ") + " { "  : "") + selectorInfo.selector + ( medias ? " } " : "");
     tooltipElement.style.backgroundColor = "#eee";
 
     var matchedNodesCanvas = document.getElementById("layout-editor-matched-nodes-canvas");