Move the fpdfsdk/include/pdfwindow/ headers into fpdfsdk/pdfwindow.

fpdfsdk/include/pdfwindow/PWL_SpecialButton.h

Index: fpdfsdk/include/pdfwindow/PWL_SpecialButton.h
diff --git a/fpdfsdk/include/pdfwindow/PWL_SpecialButton.h b/fpdfsdk/include/pdfwindow/PWL_SpecialButton.h
deleted file mode 100644
index 35b2c3f43e09bf84766465e550a583746265b987..0000000000000000000000000000000000000000
--- a/fpdfsdk/include/pdfwindow/PWL_SpecialButton.h
+++ /dev/null
@@ -1,56 +0,0 @@
-// Copyright 2014 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 FPDFSDK_INCLUDE_PDFWINDOW_PWL_SPECIALBUTTON_H_
-#define FPDFSDK_INCLUDE_PDFWINDOW_PWL_SPECIALBUTTON_H_
-
-#include "fpdfsdk/include/pdfwindow/PWL_Button.h"
-
-class CPWL_PushButton : public CPWL_Button {
- public:
-  CPWL_PushButton();
-  ~CPWL_PushButton() override;
-
-  // CPWL_Button
-  CFX_ByteString GetClassName() const override;
-  CFX_FloatRect GetFocusRect() const override;
-};
-
-class CPWL_CheckBox : public CPWL_Button {
- public:
-  CPWL_CheckBox();
-  ~CPWL_CheckBox() override;
-
-  // CPWL_Button
-  CFX_ByteString GetClassName() const override;
-  FX_BOOL OnLButtonUp(const CFX_FloatPoint& point, FX_DWORD nFlag) override;
-  FX_BOOL OnChar(uint16_t nChar, FX_DWORD nFlag) override;
-
-  void SetCheck(bool bCheck);
-  bool IsChecked() const;
-
- private:
-  bool m_bChecked;
-};
-
-class CPWL_RadioButton : public CPWL_Button {
- public:
-  CPWL_RadioButton();
-  ~CPWL_RadioButton() override;
-
-  // CPWL_Button
-  CFX_ByteString GetClassName() const override;
-  FX_BOOL OnLButtonUp(const CFX_FloatPoint& point, FX_DWORD nFlag) override;
-  FX_BOOL OnChar(uint16_t nChar, FX_DWORD nFlag) override;
-
-  void SetCheck(bool bCheck);
-  bool IsChecked() const;
-
- private:
-  bool m_bChecked;
-};
-
-#endif  // FPDFSDK_INCLUDE_PDFWINDOW_PWL_SPECIALBUTTON_H_