Show custom properties in the computed style pane of the inspector.

third_party/WebKit/LayoutTests/http/tests/inspector/elements-test.js

Index: third_party/WebKit/LayoutTests/http/tests/inspector/elements-test.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/inspector/elements-test.js b/third_party/WebKit/LayoutTests/http/tests/inspector/elements-test.js
index 02d4a8acad7660f28af9a08dcd6711b8a0ac2fe6..dea9b971ca019ec3f17ab1ca9c11711347675022 100644
--- a/third_party/WebKit/LayoutTests/http/tests/inspector/elements-test.js
+++ b/third_party/WebKit/LayoutTests/http/tests/inspector/elements-test.js
@@ -282,9 +282,9 @@ InspectorTest.selectNodeAndWaitForStylesWithComputed = function(idValue, callbac
     callback = InspectorTest.safeWrap(callback);
     InspectorTest.selectNodeAndWaitForStyles(idValue, onSidebarRendered);
 
-    function onSidebarRendered()
+    function onSidebarRendered(node)
     {
-        InspectorTest.computedStyleWidget().doUpdate().then(callback);
+        InspectorTest.computedStyleWidget().doUpdate().then(callback.bind(null, node));
     }
 }