Remove xfa_common.h and IWYU.

xfa/src/fxfa/src/app/xfa_fwladapter.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/src/foxitlib.h"
 #include "xfa/src/fxfa/src/app/xfa_ffdoc.h"
 #include "xfa/src/fxfa/src/app/xfa_fffield.h"
 #include "xfa/src/fxfa/src/app/xfa_ffwidget.h"
 #include "xfa/src/fxfa/src/app/xfa_fwladapter.h"
-#include "xfa/src/fxfa/src/common/xfa_common.h"
 
 void FWL_PostMessageToMainRoop(CFWL_Message* pMessage) {}
 FX_BOOL FWL_ShowCaret(IFWL_Widget* pWidget,
                       FX_BOOL bVisible,
                       const CFX_RectF* pRtAnchor) {
   CXFA_FFWidget* pXFAWidget = (CXFA_FFWidget*)pWidget->GetPrivateData(pWidget);
   if (!pXFAWidget) {
     return FALSE;
   }
   IXFA_DocProvider* pDocProvider = pXFAWidget->GetDoc()->GetDocProvider();
@@ skipping 43 matching lines @@
                                               CFX_RectF& rtPopup) {
   CXFA_FFWidget* pFFWidget = (CXFA_FFWidget*)(pWidget->GetPrivateData(pWidget));
   CFX_Matrix mt;
   pFFWidget->GetRotateMatrix(mt);
   CFX_RectF rtRotateAnchor(rtAnchor);
   mt.TransformRect(rtRotateAnchor);
   pFFWidget->GetDoc()->GetDocProvider()->GetPopupPos(
       pFFWidget, fMinHeight, fMaxHeight, rtRotateAnchor, rtPopup);
   return TRUE;
 }