DevTools: use target-based model accessors only.

LayoutTests/inspector/load-file-resource-for-frontend.html

Index: LayoutTests/inspector/load-file-resource-for-frontend.html
diff --git a/LayoutTests/inspector/load-file-resource-for-frontend.html b/LayoutTests/inspector/load-file-resource-for-frontend.html
index 485fa9c7985943695880a108a40c28ab445345c1..9c2f080c88980fe05e002aa4b7cb1c5e6195ecf6 100644
--- a/LayoutTests/inspector/load-file-resource-for-frontend.html
+++ b/LayoutTests/inspector/load-file-resource-for-frontend.html
@@ -6,12 +6,12 @@ function test()
 {
     function testLoadForURL(url, next)
     {
-        var documentURL = WebInspector.resourceTreeModel.mainFrame.url;
+        var documentURL = InspectorTest.resourceTreeModel.mainFrame.url;
         var lastIndexOfSlash = documentURL.lastIndexOf("/");
         var urlPrefix = documentURL.substr(0, lastIndexOfSlash + 1);
         var fullURL = urlPrefix + url;
         InspectorTest.addResult("Loading resource from " + url);
-        InspectorTest.NetworkAgent.loadResourceForFrontend(WebInspector.resourceTreeModel.mainFrame.id, fullURL, undefined, callback);
+        InspectorTest.NetworkAgent.loadResourceForFrontend(InspectorTest.resourceTreeModel.mainFrame.id, fullURL, undefined, callback);
 
         function callback(error, statusCode, headers, content)
         {