Move xfa/fwl/core to xfa/fwl.

xfa/fwl/cfwl_messagekillfocus.h

Index: xfa/fwl/cfwl_messagekillfocus.h
diff --git a/xfa/fwl/cfwl_messagekillfocus.h b/xfa/fwl/cfwl_messagekillfocus.h
new file mode 100644
index 0000000000000000000000000000000000000000..d6ca799efb1385b85adf5788c26e727b28b72e61
--- /dev/null
+++ b/xfa/fwl/cfwl_messagekillfocus.h
@@ -0,0 +1,26 @@
+// 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_CFWL_MESSAGEKILLFOCUS_H_
+#define XFA_FWL_CFWL_MESSAGEKILLFOCUS_H_
+
+#include <memory>
+
+#include "xfa/fwl/cfwl_message.h"
+
+class CFWL_MessageKillFocus : public CFWL_Message {
+ public:
+  explicit CFWL_MessageKillFocus(CFWL_Widget* pSrcTarget);
+  CFWL_MessageKillFocus(CFWL_Widget* pSrcTarget, CFWL_Widget* pDstTarget);
+  ~CFWL_MessageKillFocus() override;
+
+  // CFWL_Message
+  std::unique_ptr<CFWL_Message> Clone() override;
+
+  CFWL_Widget* m_pSetFocus;
+};
+
+#endif  // XFA_FWL_CFWL_MESSAGEKILLFOCUS_H_