Add some consts and remove more casts in core/

core/fpdfdoc/ctypeset.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/fpdfdoc/ctypeset.h"
 
 #include <algorithm>
 
@@ skipping 196 matching lines @@
         nStart = m_pVT->m_nCharArray - m_pSection->m_WordArray.GetSize();
         pLine->m_LineInfo.fLineX =
             fNodeWidth * nStart - fNodeWidth * VARIABLETEXT_HALF;
         break;
     }
     for (int32_t w = 0, sz = m_pSection->m_WordArray.GetSize(); w < sz; w++) {
       if (w >= m_pVT->m_nCharArray) {
         break;
       }
       fNextWidth = 0;
-      if (CPVT_WordInfo* pNextWord =
-              (CPVT_WordInfo*)m_pSection->m_WordArray.GetAt(w + 1)) {
+      if (CPVT_WordInfo* pNextWord = m_pSection->m_WordArray.GetAt(w + 1)) {
         pNextWord->fWordTail = 0;
         fNextWidth = m_pVT->GetWordWidth(*pNextWord);
       }
-      if (CPVT_WordInfo* pWord =
-              (CPVT_WordInfo*)m_pSection->m_WordArray.GetAt(w)) {
+      if (CPVT_WordInfo* pWord = m_pSection->m_WordArray.GetAt(w)) {
         pWord->fWordTail = 0;
         FX_FLOAT fWordWidth = m_pVT->GetWordWidth(*pWord);
         FX_FLOAT fWordAscent = m_pVT->GetWordAscent(*pWord);
         FX_FLOAT fWordDescent = m_pVT->GetWordDescent(*pWord);
         x = (FX_FLOAT)(fNodeWidth * (w + nStart + 0.5) -
                        fWordWidth * VARIABLETEXT_HALF);
         pWord->fWordX = x;
         pWord->fWordY = y;
         if (w == 0) {
           pLine->m_LineInfo.fLineX = x;
@@ skipping 253 matching lines @@
             }
             fPosX += m_pVT->GetWordWidth(*pWord);
           }
         }
         fPosY -= pLine->m_LineInfo.fLineDescent;
       }
     }
   }
   m_rcRet = CPVT_FloatRect(fMinX, fMinY, fMaxX, fMaxY);
 }