Make CPDF_GraphState have a CPDF_GraphStateData instead of inheriting

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 863 matching lines @@
   }
 }
 
 void CPDF_StreamContentParser::Handle_SetFlat() {
   m_pCurStates->m_GeneralState.GetPrivateCopy()->m_Flatness = GetNumber(0);
 }
 
 void CPDF_StreamContentParser::Handle_BeginImageData() {}
 
 void CPDF_StreamContentParser::Handle_SetLineJoin() {
-  m_pCurStates->m_GraphState.GetPrivateCopy()->m_LineJoin =
-      (CFX_GraphStateData::LineJoin)GetInteger(0);
+  m_pCurStates->m_GraphState.SetLineJoin(
+      static_cast<CFX_GraphStateData::LineJoin>(GetInteger(0)));
 }
 
 void CPDF_StreamContentParser::Handle_SetLineCap() {
-  m_pCurStates->m_GraphState.GetPrivateCopy()->m_LineCap =
-      (CFX_GraphStateData::LineCap)GetInteger(0);
+  m_pCurStates->m_GraphState.SetLineCap(
+      static_cast<CFX_GraphStateData::LineCap>(GetInteger(0)));
 }
 
 void CPDF_StreamContentParser::Handle_SetCMYKColor_Fill() {
   if (m_ParamCount != 4)
     return;
 
   FX_FLOAT values[4];
   for (int i = 0; i < 4; i++) {
     values[i] = GetNumber(3 - i);
   }
@@ skipping 22 matching lines @@
 
 void CPDF_StreamContentParser::Handle_MoveTo() {
   if (m_ParamCount != 2)
     return;
 
   AddPathPoint(GetNumber(1), GetNumber(0), FXPT_MOVETO);
   ParsePathObject();
 }
 
 void CPDF_StreamContentParser::Handle_SetMiterLimit() {
-  m_pCurStates->m_GraphState.GetPrivateCopy()->m_MiterLimit = GetNumber(0);
+  m_pCurStates->m_GraphState.SetMiterLimit(GetNumber(0));
 }
 
 void CPDF_StreamContentParser::Handle_MarkPlace() {}
 
 void CPDF_StreamContentParser::Handle_EndPath() {
   AddPathObject(0, FALSE);
 }
 
 void CPDF_StreamContentParser::Handle_SaveGraphState() {
   std::unique_ptr<CPDF_AllStates> pStates(new CPDF_AllStates);
@@ skipping 448 matching lines @@
   m_pCurStates->m_TextY = m_pCurStates->m_TextLineY;
 }
 
 void CPDF_StreamContentParser::Handle_CurveTo_23() {
   AddPathPoint(m_PathCurrentX, m_PathCurrentY, FXPT_BEZIERTO);
   AddPathPoint(GetNumber(3), GetNumber(2), FXPT_BEZIERTO);
   AddPathPoint(GetNumber(1), GetNumber(0), FXPT_BEZIERTO);
 }
 
 void CPDF_StreamContentParser::Handle_SetLineWidth() {
-  FX_FLOAT width = GetNumber(0);
-  m_pCurStates->m_GraphState.GetPrivateCopy()->m_LineWidth = width;
+  m_pCurStates->m_GraphState.SetLineWidth(GetNumber(0));
 }
 
 void CPDF_StreamContentParser::Handle_Clip() {
   m_PathClipType = FXFILL_WINDING;
 }
 
 void CPDF_StreamContentParser::Handle_EOClip() {
   m_PathClipType = FXFILL_ALTERNATE;
 }
 
@@ skipping 270 matching lines @@
         } else {
           PDF_ReplaceAbbr(pElement);
         }
       }
       break;
     }
     default:
       break;
   }
 }