Correctly attribute exceptions thrown inside a Worker's imported scripts.

Source/bindings/v8/WorkerScriptController.h

Index: Source/bindings/v8/WorkerScriptController.h
diff --git a/Source/bindings/v8/WorkerScriptController.h b/Source/bindings/v8/WorkerScriptController.h
index 4e72f3054eddccc4f0a31d8438de93312f8ddcd7..db806c0384d0527b7f6806da59cb2e95b3992dea 100644
--- a/Source/bindings/v8/WorkerScriptController.h
+++ b/Source/bindings/v8/WorkerScriptController.h
@@ -33,10 +33,11 @@
 
 #include "bindings/v8/ScriptValue.h"
 #include "bindings/v8/V8Binding.h"
-#include <v8.h>
+#include "core/dom/ErrorEvent.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/Threading.h"
 #include "wtf/text/TextPosition.h"
+#include <v8.h>
 
 namespace WebCore {
 
@@ -67,9 +68,9 @@ namespace WebCore {
 
         WorkerGlobalScope* workerGlobalScope() { return m_workerGlobalScope; }
 
-        void evaluate(const ScriptSourceCode&, ScriptValue* = 0);
+        void evaluate(const ScriptSourceCode&, RefPtr<ErrorEvent>* = 0);
 
-        void setException(const ScriptValue&);
+        void rethrowExceptionFromImportedScript(PassRefPtr<ErrorEvent>);
 
         // Async request to terminate a future JS execution. Eventually causes termination
         // exception raised during JS execution, if the worker thread happens to run JS.
@@ -113,6 +114,7 @@ namespace WebCore {
         bool m_executionForbidden;
         bool m_executionScheduledToTerminate;
         mutable Mutex m_scheduledTerminationMutex;
+        RefPtr<ErrorEvent> m_errorEventFromImportedScript;
     };
 
 } // namespace WebCore