DevTools: use target-based model accessors only.

LayoutTests/inspector/console/console-timestamp.html

Index: LayoutTests/inspector/console/console-timestamp.html
diff --git a/LayoutTests/inspector/console/console-timestamp.html b/LayoutTests/inspector/console/console-timestamp.html
index 06d5b49e270e2a92b798b7303767d48272d5cfd5..9707a2ab43d0c44120f783800f81e9e7ad14f7d9 100644
--- a/LayoutTests/inspector/console/console-timestamp.html
+++ b/LayoutTests/inspector/console/console-timestamp.html
@@ -14,7 +14,7 @@ function test()
     function addMessageWithFixedTimestamp(messageText, timestamp)
     {
         var message = new WebInspector.ConsoleMessage(
-            WebInspector.consoleModel.target(),
+            InspectorTest.consoleModel.target(),
             WebInspector.ConsoleMessage.MessageSource.Other, // source
             WebInspector.ConsoleMessage.MessageLevel.Log, // level
             messageText,
@@ -27,7 +27,7 @@ function test()
             undefined, // stackTrace
             timestamp || baseTimestamp + 123, // timestamp: 2014-05-13T16:53:20.123Z
             false); // isOutdated
-        WebInspector.consoleModel.addMessage(message, true); // allowGrouping
+        InspectorTest.consoleModel.addMessage(message, true); // allowGrouping
     }
 
     InspectorTest.addResult("Console messages with timestamps disabled:");