DevTools: use target-based model accessors only.

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

 var initialize_ConsoleTest = function() {
 
 InspectorTest.preloadPanel("console");
 
 InspectorTest.evaluateInConsole = function(code, callback)
 {
     callback = InspectorTest.safeWrap(callback);
 
     var consoleView = WebInspector.ConsolePanel._view();
     consoleView.visible = true;
@@ skipping 234 matching lines @@
             else
                 InspectorTest.addResult("SUCCESS: message parameters list is empty. ");
         } else {
             InspectorTest.addResult("FAILED: didn't find _parameters field in the message.");
         }
     }
 }
 
 InspectorTest.waitUntilMessageReceived = function(callback)
 {
-    InspectorTest.addSniffer(WebInspector.consoleModel, "addMessage", callback, false);
+    InspectorTest.addSniffer(InspectorTest.consoleModel, "addMessage", callback, false);
 }
 
 InspectorTest.waitUntilNthMessageReceived = function(count, callback)
 {
     function override()
     {
         if (--count === 0)
             InspectorTest.safeWrap(callback)();
         else
-            InspectorTest.addSniffer(WebInspector.consoleModel, "addMessage", override, false);
+            InspectorTest.addSniffer(InspectorTest.consoleModel, "addMessage", override, false);
     }
-    InspectorTest.addSniffer(WebInspector.consoleModel, "addMessage", override, false);
+    InspectorTest.addSniffer(InspectorTest.consoleModel, "addMessage", override, false);
 }
 
 InspectorTest.changeExecutionContext = function(namePrefix)
 {
     var selector = WebInspector.ConsolePanel._view()._executionContextSelector._selectElement;
     var option = selector.firstChild;
     while (option) {
         if (option.textContent && option.textContent.startsWith(namePrefix))
             break;
         option = option.nextSibling;
     }
     if (!option) {
         InspectorTest.addResult("FAILED: context with prefix: "  + namePrefix + " not found in the context list");
         return;
     }
     option.selected = true;
     WebInspector.ConsolePanel._view()._executionContextChanged();
 }
 
 }