DevTools: properly format custom elements without nodenames

third_party/WebKit/Source/platform/v8_inspector/InjectedScriptSource.js

Index: third_party/WebKit/Source/platform/v8_inspector/InjectedScriptSource.js
diff --git a/third_party/WebKit/Source/platform/v8_inspector/InjectedScriptSource.js b/third_party/WebKit/Source/platform/v8_inspector/InjectedScriptSource.js
index e15ab5e6d2c599086bae6c335f03a8d2b2f5162a..0e0c4f8d28065b05a5f348091ce7784c29cfe994 100644
--- a/third_party/WebKit/Source/platform/v8_inspector/InjectedScriptSource.js
+++ b/third_party/WebKit/Source/platform/v8_inspector/InjectedScriptSource.js
@@ -580,7 +580,12 @@ InjectedScript.prototype = {
             return toString(obj);
 
         if (subtype === "node") {
-            var description = obj.nodeName.toLowerCase();
+            var description = "";
+            if (obj.nodeName)
+                description = obj.nodeName.toLowerCase();
+            else if (obj.constructor)
+                description = obj.constructor.name.toLowerCase();
+
             switch (obj.nodeType) {
             case 1 /* Node.ELEMENT_NODE */:
                 description += obj.id ? "#" + obj.id : "";