Merge to XFA: Remove header files that only have includes.

fpdfsdk/src/formfiller/FFL_PushButton.cpp

 // 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
 
+#include "fpdfsdk/include/formfiller/FFL_PushButton.h"
+
 #include "fpdfsdk/include/formfiller/FFL_FormFiller.h"
-#include "fpdfsdk/include/formfiller/FFL_PushButton.h"
-#include "fpdfsdk/include/formfiller/FormFiller.h"
-
-/* ------------------------------- CFFL_PushButton
- * ------------------------------- */
+#include "fpdfsdk/include/pdfwindow/PWL_SpecialButton.h"
 
 CFFL_PushButton::CFFL_PushButton(CPDFDoc_Environment* pApp,
                                  CPDFSDK_Annot* pAnnot)
     : CFFL_Button(pApp, pAnnot) {}
 
 CFFL_PushButton::~CFFL_PushButton() {}
 
 CPWL_Wnd* CFFL_PushButton::NewPDFWindow(const PWL_CREATEPARAM& cp,
                                         CPDFSDK_PageView* pPageView) {
   CPWL_PushButton* pWnd = new CPWL_PushButton();
   pWnd->Create(cp);
 
   return pWnd;
 }
 
 FX_BOOL CFFL_PushButton::OnChar(CPDFSDK_Annot* pAnnot,
                                 FX_UINT nChar,
                                 FX_UINT nFlags) {
   return CFFL_FormFiller::OnChar(pAnnot, nChar, nFlags);
 }
 
 void CFFL_PushButton::OnDraw(CPDFSDK_PageView* pPageView,
                              CPDFSDK_Annot* pAnnot,
                              CFX_RenderDevice* pDevice,
                              CFX_Matrix* pUser2Device,
                              FX_DWORD dwFlags) {
   CFFL_Button::OnDraw(pPageView, pAnnot, pDevice, pUser2Device, dwFlags);
 }