DevTools: use target-based model accessors only.

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

 var framesCount = 0;
 
 function createAndNavigateIFrame(url)
 {
     var iframe = document.createElement("iframe");
     iframe.src = url;
     iframe.name = "frame" + ++framesCount;
     iframe.id = iframe.name;
     document.body.appendChild(iframe);
 }
@@ skipping 24 matching lines @@
     InspectorTest.evaluateInPage("createAndNavigateIFrame(unescape('" + escape(url) + "'))");
 
     function frameNavigated(frame)
     {
         callback(frame.id);
     }
 }
 
 InspectorTest.navigateIFrame = function(frameId, url, callback)
 {
-    var frame = WebInspector.resourceTreeModel.frameForId(frameId)
+    var frame = InspectorTest.resourceTreeModel.frameForId(frameId)
     InspectorTest.evaluateInPage("navigateIFrame(unescape('" + escape(frame.name) +"'), unescape('" + escape(url) + "'))");
     InspectorTest.addSniffer(WebInspector.ResourceTreeModel.prototype, "_frameNavigated", frameNavigated);
 
     function frameNavigated(frame)
     {
         callback(frame.id);
     }
 }
 
 InspectorTest.removeIFrame = function(frameId, callback)
 {
-    var frame = WebInspector.resourceTreeModel.frameForId(frameId)
+    var frame = InspectorTest.resourceTreeModel.frameForId(frameId)
     InspectorTest.evaluateInPage("removeIFrame(unescape('" + escape(frame.name) +"'))");
     InspectorTest.addSniffer(WebInspector.ResourceTreeModel.prototype, "_frameDetached", frameDetached);
 
     function frameDetached(frame)
     {
         callback(frame.id);
     }
 }
 
 InspectorTest.swapFrameCache = function(frameId)
 {
-    var frame = WebInspector.resourceTreeModel.frameForId(frameId);
+    var frame = InspectorTest.resourceTreeModel.frameForId(frameId);
     InspectorTest.evaluateInPage("swapFrameCache(unescape('" + escape(frame.name) +"'))");
 }
 
 
 InspectorTest.dumpApplicationCache = function()
 {
     InspectorTest.dumpApplicationCacheTree();
     InspectorTest.dumpApplicationCacheModel();
     InspectorTest.addResult("");
 }
@@ skipping 17 matching lines @@
             var frameTreeElement = manifestTreeElement.children[j];
             InspectorTest.addResult("        Frame: " + frameTreeElement.displayName);
         }
     }
 }
 
 InspectorTest.frameIdToString = function(frameId)
 {
     if (!InspectorTest.framesByFrameId)
         InspectorTest.framesByFrameId = {};
-    var frame = WebInspector.resourceTreeModel.frameForId(frameId);
+    var frame = InspectorTest.resourceTreeModel.frameForId(frameId);
     if (!frame)
         frame = InspectorTest.framesByFrameId[frameId];
     InspectorTest.framesByFrameId[frameId] = frame;
 
     return frame.name;
 }
 
 InspectorTest.applicationCacheStatusToString = function(status)
 {
     var statusInformation = {};
@@ skipping 83 matching lines @@
         return;
     }
 
     if (!InspectorTest.awaitedFrameStatusEventsCount)
         InspectorTest.awaitedFrameStatusEventsCount = {};
     InspectorTest.awaitedFrameStatusEventsCount[frameId] = { count: eventsLeft, callback: callback };
 }
 
 };