Trigger `window.onerror` only for exceptions thrown in the same world.

Source/bindings/v8/WorkerScriptController.cpp

Index: Source/bindings/v8/WorkerScriptController.cpp
diff --git a/Source/bindings/v8/WorkerScriptController.cpp b/Source/bindings/v8/WorkerScriptController.cpp
index cbbf758d16dd43363d69cf05307ca3bd3be1de5b..e05498661a08f9b7cc7f9d4af3128b3ffc01b11c 100644
--- a/Source/bindings/v8/WorkerScriptController.cpp
+++ b/Source/bindings/v8/WorkerScriptController.cpp
@@ -189,11 +189,11 @@ void WorkerScriptController::evaluate(const ScriptSourceCode& sourceCode, RefPtr
     if (state.hadException) {
         if (errorEvent) {
             *errorEvent = m_workerGlobalScope->shouldSanitizeScriptError(state.sourceURL, NotSharableCrossOrigin) ?
-                ErrorEvent::createSanitizedError() : ErrorEvent::create(state.errorMessage, state.sourceURL, state.lineNumber, state.columnNumber);
+                ErrorEvent::createSanitizedError() : ErrorEvent::create(state.errorMessage, state.sourceURL, state.lineNumber, state.columnNumber, 0);

[adamk, 2013/09/05 19:24:20]

The magic-ness of "workers don't have worlds" is beginning to bug me a bit, but
I don't know what the right solution is...

             V8ErrorHandler::storeExceptionOnErrorEventWrapper(errorEvent->get(), state.exception.v8Value(), m_isolate);
         } else {
             ASSERT(!m_workerGlobalScope->shouldSanitizeScriptError(state.sourceURL, NotSharableCrossOrigin));
-            RefPtr<ErrorEvent> event = m_errorEventFromImportedScript ? m_errorEventFromImportedScript.release() : ErrorEvent::create(state.errorMessage, state.sourceURL, state.lineNumber, state.columnNumber);
+            RefPtr<ErrorEvent> event = m_errorEventFromImportedScript ? m_errorEventFromImportedScript.release() : ErrorEvent::create(state.errorMessage, state.sourceURL, state.lineNumber, state.columnNumber, 0);
             m_workerGlobalScope->reportException(event, 0, NotSharableCrossOrigin);
         }
     }