Make CPDF_GeneralState have a CPDF_GeneralStateData

core/fpdfapi/fpdf_page/fpdf_page_parser.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 "core/fpdfapi/fpdf_page/pageint.h"
 
 #include <memory>
 #include <utility>
@@ skipping 855 matching lines @@
     return;
   }
   if (m_PathStartX != m_PathCurrentX || m_PathStartY != m_PathCurrentY) {
     AddPathPoint(m_PathStartX, m_PathStartY, FXPT_LINETO | FXPT_CLOSEFIGURE);
   } else if (m_pPathPoints[m_PathPointCount - 1].m_Flag != FXPT_MOVETO) {
     m_pPathPoints[m_PathPointCount - 1].m_Flag |= FXPT_CLOSEFIGURE;
   }
 }
 
 void CPDF_StreamContentParser::Handle_SetFlat() {
-  m_pCurStates->m_GeneralState.GetPrivateCopy()->m_Flatness = GetNumber(0);
+  m_pCurStates->m_GeneralState.SetFlatness(GetNumber(0));
 }
 
 void CPDF_StreamContentParser::Handle_BeginImageData() {}
 
 void CPDF_StreamContentParser::Handle_SetLineJoin() {
   m_pCurStates->m_GraphState.SetLineJoin(
       static_cast<CFX_GraphStateData::LineJoin>(GetInteger(0)));
 }
 
 void CPDF_StreamContentParser::Handle_SetLineCap() {
@@ skipping 794 matching lines @@
         } else {
           PDF_ReplaceAbbr(pElement);
         }
       }
       break;
     }
     default:
       break;
   }
 }