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

Source/core/workers/WorkerGlobalScope.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2009, 2011 Google Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 196 matching lines @@
         scriptLoader->loadSynchronously(scriptExecutionContext(), *it, AllowCrossOriginRequests);
 
         // If the fetching attempt failed, throw a NetworkError exception and abort all these steps.
         if (scriptLoader->failed()) {
             es.throwDOMException(NetworkError);
             return;
         }
 
         InspectorInstrumentation::scriptImported(scriptExecutionContext(), scriptLoader->identifier(), scriptLoader->script());
 
-        ScriptValue exception;
-        m_script->evaluate(ScriptSourceCode(scriptLoader->script(), scriptLoader->responseURL()), &exception);
-        if (!exception.hasNoValue()) {
-            m_script->setException(exception);
+        RefPtr<ErrorEvent> errorEvent;
+        m_script->evaluate(ScriptSourceCode(scriptLoader->script(), scriptLoader->responseURL()), &errorEvent);
+        if (errorEvent) {
+            m_script->rethrowExceptionFromImportedScript(errorEvent.release());
             return;
         }
     }
 }
 
 EventTarget* WorkerGlobalScope::errorEventTarget()
 {
     return this;
 }
 
@@ skipping 103 matching lines @@
 {
     return script()->idleNotification();
 }
 
 WorkerEventQueue* WorkerGlobalScope::eventQueue() const
 {
     return m_eventQueue.get();
 }
 
 } // namespace WebCore