Remove include only fwl.h and IWYU.

xfa/src/fwl/src/theme/pushbuttontp.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 "xfa/include/fwl/theme/pushbuttontp.h"
+
+#include "xfa/include/fwl/basewidget/fwl_pushbutton.h"
+#include "xfa/include/fwl/core/fwl_widget.h"
 #include "xfa/src/foxitlib.h"
+
 #define PUSHBUTTON_SIZE_Corner 2
+
 CFWL_PushButtonTP::CFWL_PushButtonTP() {
   m_pThemeData = new PBThemeData;
   SetThemeData(0);
 }
 CFWL_PushButtonTP::~CFWL_PushButtonTP() {
   if (m_pThemeData) {
     delete m_pThemeData;
   }
 }
 FX_BOOL CFWL_PushButtonTP::IsValidWidget(IFWL_Widget* pWidget) {
@@ skipping 124 matching lines @@
     m_pThemeData->clrFill[0] = ArgbEncode(255, 255, 255, 255);
     m_pThemeData->clrFill[1] = ArgbEncode(255, 226, 225, 218);
     m_pThemeData->clrFill[2] = ArgbEncode(255, 255, 255, 255);
     m_pThemeData->clrFill[3] = ArgbEncode(255, 255, 255, 255);
     m_pThemeData->clrFill[4] = ArgbEncode(255, 245, 244, 234);
   }
 }
 int32_t CFWL_PushButtonTP::GetColorID(FX_DWORD dwStates) {
   return dwStates &= FWL_PARTSTATE_PSB_Mask;
 }