Make CPDF_GraphState have a CPDF_GraphStateData instead of inheriting

core/fpdfapi/fpdf_page/cpdf_textobject.cpp

 // Copyright 2016 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/include/cpdf_textobject.h"
 
 #include "core/fpdfapi/fpdf_font/cpdf_cidfont.h"
 #include "core/fpdfapi/fpdf_font/include/cpdf_font.h"
@@ skipping 347 matching lines @@
     max_y = max_y * fontsize / 1000;
   }
   CFX_Matrix matrix;
   GetTextMatrix(&matrix);
   m_Left = min_x;
   m_Right = max_x;
   m_Bottom = min_y;
   m_Top = max_y;
   matrix.TransformRect(m_Left, m_Right, m_Top, m_Bottom);
   if (TextRenderingModeIsStrokeMode(m_TextState.GetTextMode())) {
-    FX_FLOAT half_width = m_GraphState.GetObject()->m_LineWidth / 2;
+    FX_FLOAT half_width = m_GraphState.GetLineWidth() / 2;
     m_Left -= half_width;
     m_Right += half_width;
     m_Top += half_width;
     m_Bottom -= half_width;
   }
 }
 
 void CPDF_TextObject::SetPosition(FX_FLOAT x, FX_FLOAT y) {
   FX_FLOAT dx = x - m_PosX;
   FX_FLOAT dy = y - m_PosY;
   m_PosX = x;
   m_PosY = y;
   m_Left += dx;
   m_Right += dx;
   m_Top += dy;
   m_Bottom += dy;
 }
 
 void CPDF_TextObject::RecalcPositionData() {
   CalcPositionData(nullptr, nullptr, 1);
 }