Move xfa/fwl/core to xfa/fwl.

xfa/fwl/core/cfwl_msgmousewheel.h

Index: xfa/fwl/core/cfwl_msgmousewheel.h
diff --git a/xfa/fwl/core/cfwl_msgmousewheel.h b/xfa/fwl/core/cfwl_msgmousewheel.h
deleted file mode 100644
index 503bcdebe8f3760b59e511c2114c0f0548d88968..0000000000000000000000000000000000000000
--- a/xfa/fwl/core/cfwl_msgmousewheel.h
+++ /dev/null
@@ -1,29 +0,0 @@
-// 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_MSGMOUSEWHEEL_H_
-#define XFA_FWL_CORE_CFWL_MSGMOUSEWHEEL_H_
-
-#include <memory>
-
-#include "xfa/fwl/core/cfwl_message.h"
-
-class CFWL_MsgMouseWheel : public CFWL_Message {
- public:
-  CFWL_MsgMouseWheel(CFWL_Widget* pSrcTarget, CFWL_Widget* pDstTarget);
-  ~CFWL_MsgMouseWheel() override;
-
-  // CFWL_Message
-  std::unique_ptr<CFWL_Message> Clone() override;
-
-  FX_FLOAT m_fx;
-  FX_FLOAT m_fy;
-  FX_FLOAT m_fDeltaX;
-  FX_FLOAT m_fDeltaY;
-  uint32_t m_dwFlags;
-};
-
-#endif  // XFA_FWL_CORE_CFWL_MSGMOUSEWHEEL_H_