Include Event.h in fewer header files

Source/modules/notifications/Notification.cpp

 /*
  * Copyright (C) 2013 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 16 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "modules/notifications/Notification.h"
 
 #include "bindings/v8/Dictionary.h"
 #include "bindings/v8/ScriptWrappable.h"
 #include "core/dom/Document.h"
+#include "core/events/Event.h"
 #include "core/frame/UseCounter.h"
 #include "core/page/WindowFocusAllowedIndicator.h"
 #include "modules/notifications/NotificationClient.h"
 #include "modules/notifications/NotificationController.h"
 
 namespace WebCore {
 
 Notification* Notification::create(ExecutionContext* context, const String& title, const Dictionary& options)
 {
     NotificationClient& client = NotificationController::clientFrom(toDocument(context)->frame());
@@ skipping 149 matching lines @@
     m_client = 0;
     m_state = Closed;
 }
 
 bool Notification::hasPendingActivity() const
 {
     return m_state == Showing || (m_asyncRunner && m_asyncRunner->isActive());
 }
 
 } // namespace WebCore