Include Event.h in fewer header files

Source/modules/netinfo/NetworkInformation.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "modules/netinfo/NetworkInformation.h"
 
 #include "core/dom/ExecutionContext.h"
+#include "core/events/Event.h"
 #include "core/page/NetworkStateNotifier.h"
 #include "modules/EventTargetModules.h"
 #include "wtf/text/WTFString.h"
 
 namespace {
 
 String connectionTypeToString(blink::WebConnectionType type)
 {
     switch (type) {
     case blink::ConnectionTypeCellular:
@@ skipping 121 matching lines @@
 NetworkInformation::NetworkInformation(ExecutionContext* context)
     : ActiveDOMObject(context)
     , m_type(networkStateNotifier().connectionType())
     , m_observing(false)
     , m_contextStopped(false)
 {
     ScriptWrappable::init(this);
 }
 
 } // namespace WebCore