DevTools: use target-based model accessors only.

LayoutTests/inspector/elements/resources/iframe-load-event-iframe.js

Index: LayoutTests/inspector/elements/resources/iframe-load-event-iframe.js
diff --git a/LayoutTests/inspector/elements/resources/iframe-load-event-iframe.js b/LayoutTests/inspector/elements/resources/iframe-load-event-iframe.js
index 18962715e667a0c28a19c3b8d499301570039b6f..6f7673cefd08cdf8d435f4934d8438ef13860af1 100644
--- a/LayoutTests/inspector/elements/resources/iframe-load-event-iframe.js
+++ b/LayoutTests/inspector/elements/resources/iframe-load-event-iframe.js
@@ -10,7 +10,7 @@ function test()
 
     function step1()
     {
-        WebInspector.domModel.addEventListener(WebInspector.DOMModel.Events.NodeInserted, nodeInserted);
+        InspectorTest.domModel.addEventListener(WebInspector.DOMModel.Events.NodeInserted, nodeInserted);
         InspectorTest.evaluateInPage("loadSecondIFrame()");
 
         function nodeInserted(event)
@@ -18,7 +18,7 @@ function test()
             var node = event.data;
             if (node.getAttribute("id") === "myframe") {
                 InspectorTest.expandElementsTree(step2);
-                WebInspector.domModel.removeEventListener(WebInspector.DOMModel.Events.NodeInserted, nodeInserted);
+                InspectorTest.domModel.removeEventListener(WebInspector.DOMModel.Events.NodeInserted, nodeInserted);
             }
         }
     }