Add opaque "layout item" to widgets for caller's use.

xfa/fxfa/app/xfa_ffimageedit.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/fxfa/app/xfa_ffimageedit.h"
 
 #include "xfa/fwl/core/cfwl_message.h"
 #include "xfa/fwl/core/fwl_noteimp.h"
@@ skipping 10 matching lines @@
     : CXFA_FFField(pPageView, pDataAcc), m_pOldDelegate(NULL) {}
 CXFA_FFImageEdit::~CXFA_FFImageEdit() {
   CXFA_FFImageEdit::UnloadWidget();
 }
 FX_BOOL CXFA_FFImageEdit::LoadWidget() {
   CFWL_PictureBox* pPictureBox = new CFWL_PictureBox;
   if (pPictureBox) {
     pPictureBox->Initialize();
   }
   m_pNormalWidget = (CFWL_Widget*)pPictureBox;
+  m_pNormalWidget->SetLayoutItem(this);
   IFWL_Widget* pWidget = m_pNormalWidget->GetWidget();
-  m_pNormalWidget->SetPrivateData(pWidget, this, NULL);
   CFWL_NoteDriver* pNoteDriver = FWL_GetApp()->GetNoteDriver();
   pNoteDriver->RegisterEventTarget(pWidget, pWidget);
   m_pOldDelegate = pPictureBox->SetDelegate(this);
   CXFA_FFField::LoadWidget();
   if (m_pDataAcc->GetImageEditImage()) {
     return TRUE;
   }
   UpdateFWLData();
   return TRUE;
 }
@@ skipping 87 matching lines @@
 
 void CXFA_FFImageEdit::OnProcessEvent(CFWL_Event* pEvent) {
   CXFA_FFField::OnProcessEvent(pEvent);
   m_pOldDelegate->OnProcessEvent(pEvent);
 }
 
 void CXFA_FFImageEdit::OnDrawWidget(CFX_Graphics* pGraphics,
                                     const CFX_Matrix* pMatrix) {
   m_pOldDelegate->OnDrawWidget(pGraphics, pMatrix);
 }