Split fwl/core class pt I.

xfa/fwl/core/ifwl_picturebox.h

 // 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 XFA_FWL_CORE_IFWL_PICTUREBOX_H_
 #define XFA_FWL_CORE_IFWL_PICTUREBOX_H_
 
 #include "xfa/fwl/core/cfwl_widgetproperties.h"
-#include "xfa/fwl/core/ifwl_dataprovider.h"
 #include "xfa/fwl/core/ifwl_widget.h"
 
 #define FWL_STYLEEXT_PTB_Left 0L << 0
 #define FWL_STYLEEXT_PTB_Center 1L << 0
 #define FWL_STYLEEXT_PTB_Right 2L << 0
 #define FWL_STYLEEXT_PTB_Top 0L << 2
 #define FWL_STYLEEXT_PTB_Vcenter 1L << 2
 #define FWL_STYLEEXT_PTB_Bottom 2L << 2
 #define FWL_STYLEEXT_PTB_Normal 0L << 4
 #define FWL_STYLEEXT_PTB_AutoSize 1L << 4
 #define FWL_STYLEEXT_PTB_StretchImage 2L << 4
 #define FWL_STYLEEXT_PTB_StretchHImage 3L << 4
 #define FWL_STYLEEXT_PTB_StretchVImage 4L << 4
 #define FWL_STYLEEXT_PTB_HAlignMask 3L << 0
 #define FWL_STYLEEXT_PTB_VAlignMask 3L << 2
 #define FWL_STYLEEXT_PTB_StretchAlignMask 7L << 4
 
 class CFX_DIBitmap;
 class IFWL_Widget;
 
-class IFWL_PictureBoxDP : public IFWL_DataProvider {};
-
 class IFWL_PictureBox : public IFWL_Widget {
  public:
   explicit IFWL_PictureBox(const IFWL_App* app,
                            std::unique_ptr<CFWL_WidgetProperties> properties);
   ~IFWL_PictureBox() override;
 
   // IFWL_Widget
   FWL_Type GetClassID() const override;
   void GetWidgetRect(CFX_RectF& rect, bool bAutoSize = false) override;
   void Update() override;
   void DrawWidget(CFX_Graphics* pGraphics,
                   const CFX_Matrix* pMatrix = nullptr) override;
   void OnDrawWidget(CFX_Graphics* pGraphics,
                     const CFX_Matrix* pMatrix) override;
 
  private:
   CFX_RectF m_rtClient;
   CFX_RectF m_rtImage;
   CFX_Matrix m_matrix;
 };
 
 #endif  // XFA_FWL_CORE_IFWL_PICTUREBOX_H_