Record DevTools metadata events on worker threads when starting recoring tracing based Timeline

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 97 matching lines @@
         }
         eval(functionName + "(" + evalCallback + ")");
     }
     InspectorTest.evaluateInPage("(" + asyncEvalWrapper.toString() + ")(" + id + ", unescape('" + escape(functionName) + "'))");
 }
 
 InspectorTest.didInvokePageFunctionAsync = function(callId, value)
 {
     var callback = pendingEvalRequests[callId];
     if (!callback) {
-        InspectorTest.addResult("Missing callback for ascyn eval " + callId + ", perhaps callback invoked twice?");
+        InspectorTest.addResult("Missing callback for async eval " + callId + ", perhaps callback invoked twice?");
         return;
     }
     delete pendingEvalRequests[callId];
     callback(value);
 }
 
 InspectorTest.check = function(passCondition, failureText)
 {
     if (!passCondition)
         InspectorTest.addResult("FAIL: " + failureText);
@@ skipping 709 matching lines @@
     evaluateInWebInspector: function(callId, script)
     {
         window.opener.postMessage(["evaluateInWebInspector", callId, script], "*");
     },
 
     display: function() { }
 }
 
 if (!window.testRunner && window.opener)
     window.testRunner = new StandaloneTestRunnerStub();