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

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 6a3b9a4e7d6302fbea0d347d06c49ba7823955ce..3b47fad4816bd78b28a5ae536d36b6174dc621d5 100644
--- a/LayoutTests/http/tests/inspector/inspector-test.js
+++ b/LayoutTests/http/tests/inspector/inspector-test.js
@@ -115,7 +115,7 @@ 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];