DevTools: use target-based model accessors only.

LayoutTests/http/tests/inspector/network-test.js

 // This goes before everything else to keep console message line number invariant.
 var lastXHRIndex = 0;
 function xhrLoadedCallback()
 {
     // We need to make sure the console message text is unique so that we don't end up with repeat count update only.
     console.log("XHR loaded: " + (++lastXHRIndex));
 }
 
 var initialize_NetworkTest = function() {
 
 InspectorTest.preloadPanel("network");
 
 InspectorTest.recordNetwork = function()
 {
     WebInspector.panels.network._networkLogView.setRecording(true);
 }
 
 InspectorTest.networkRequests = function()
 {
-    return WebInspector.networkLog.requests.slice();
+    return WebInspector.NetworkLog.requests();
 }
 
 InspectorTest.dumpNetworkRequests = function()
 {
     var requests = InspectorTest.networkRequests();
     requests.sort(function(a, b) {return a.url.localeCompare(b.url);});
     InspectorTest.addResult("resources count = " + requests.length);
     for (i = 0; i < requests.length; i++)
         InspectorTest.addResult(requests[i].url);
 }
@@ skipping 110 matching lines @@
 
 function resetInspectorResourcesData()
 {
     if (!window.internals)
         return false;
 
     internals.setInspectorResourcesDataSizeLimits(10 * 1000 * 1000, 1000 * 1000);
     return true;
 }