DevTools: wrap DebuggerAgent.Location with DebuggerModel.Location.

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

Index: LayoutTests/http/tests/inspector/inspector-test.js
diff --git a/LayoutTests/http/tests/inspector/inspector-test.js b/LayoutTests/http/tests/inspector/inspector-test.js
index 0984a710ae0ab4895ba17b3e6ee04394522c707c..fe9046dcdd51c5f0c8d2aec47af53bc6f381df5e 100644
--- a/LayoutTests/http/tests/inspector/inspector-test.js
+++ b/LayoutTests/http/tests/inspector/inspector-test.js
@@ -120,15 +120,12 @@ InspectorTest.addResults = function(textArray)
         InspectorTest.addResult(textArray[i]);
 }
 
-function onError(event)
+window.onerror = function (message, filename, lineno, colno, error)
 {
-    window.removeEventListener("error", onError);
-    InspectorTest.addResult("Uncaught exception in inspector front-end: " + event.message + " [" + event.filename + ":" + event.lineno + "]");
+    InspectorTest.addResult("Uncaught exception in inspector front-end: " + message + " [" + error.stack + "]");
     InspectorTest.completeTest();
 }
 
-window.addEventListener("error", onError);
-
 InspectorTest.formatters = {};
 
 InspectorTest.formatters.formatAsTypeName = function(value)