DevTools: wrap DebuggerAgent.Location with DebuggerModel.Location.

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

 var initialize_InspectorTest = function() {
 
 var results = [];
 var resultsSynchronized = false;
 
 function consoleOutputHook(messageType)
 {
     InspectorTest.addResult(messageType + ": " + Array.prototype.slice.call(arguments, 1));
 }
 
@@ skipping 102 matching lines @@
 }
 
 InspectorTest.addResults = function(textArray)
 {
     if (!textArray)
         return;
     for (var i = 0, size = textArray.length; i < size; ++i)
         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)
 {
     return "<" + typeof value + ">";
 }
 
 InspectorTest.formatters.formatAsRecentTime = function(value)
 {
     if (typeof value !== "object" || !(value instanceof Date))
@@ skipping 602 matching lines @@
     evaluateInWebInspector: function(callId, script)
     {
         window.opener.postMessage(["evaluateInWebInspector", callId, script], "*");
     },
 
     display: function() { }
 }
 
 if (!window.testRunner && window.opener)
     window.testRunner = new StandaloneTestRunnerStub();