Include Event.h in fewer header files

Source/bindings/v8/WorkerScriptController.h

 /*
  * Copyright (C) 2009, 2012 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WorkerScriptController_h
 #define WorkerScriptController_h
 
 #include "bindings/v8/ScriptValue.h"
 #include "bindings/v8/V8Binding.h"
-#include "core/events/ErrorEvent.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/ThreadingPrimitives.h"
 #include "wtf/text/TextPosition.h"
 #include <v8.h>
 
 namespace WebCore {
 
+    class ErrorEvent;
     class ScriptSourceCode;
     class ScriptValue;
     class WorkerGlobalScope;
 
     struct WorkerGlobalScopeExecutionState {
         WorkerGlobalScopeExecutionState()
             : hadException(false)
             , lineNumber(0)
             , columnNumber(0)
         {
@@ skipping 59 matching lines @@
         bool m_executionForbidden;
         bool m_executionScheduledToTerminate;
         mutable Mutex m_scheduledTerminationMutex;
         RefPtrWillBePersistent<ErrorEvent> m_errorEventFromImportedScript;
         OwnPtr<V8IsolateInterruptor> m_interruptor;
     };
 
 } // namespace WebCore
 
 #endif // WorkerScriptController_h