Move the IFWL_Edit Events out of ifwl_edit.h

xfa/fwl/core/cfwl_evttextchanged.h

+// Copyright 2016 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef XFA_FWL_CORE_CFWL_EVTTEXTCHANGED_H_
+#define XFA_FWL_CORE_CFWL_EVTTEXTCHANGED_H_
+
+#include "xfa/fwl/core/cfwl_event.h"
+
+class CFWL_EvtTextChanged : public CFWL_Event {
+ public:
+  CFWL_EvtTextChanged();
+  ~CFWL_EvtTextChanged() override;
+
+  CFWL_EventType GetClassID() const override;
+
+  int32_t nChangeType;
+  CFX_WideString wsInsert;
+  CFX_WideString wsDelete;
+  CFX_WideString wsPrevText;
+};
+
+#endif  // XFA_FWL_CORE_CFWL_EVTTEXTCHANGED_H_