Fix a few more warnings in chromium_code mode.

core/src/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 "../../../include/fpdfapi/fpdf_page.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fpdfapi/fpdf_serial.h"
 #include "pageint.h"
@@ skipping 601 matching lines @@
         return;
     }
     AddPathPoint(GetNumber(5), GetNumber(4), FXPT_BEZIERTO);
     AddPathPoint(GetNumber(3), GetNumber(2), FXPT_BEZIERTO);
     AddPathPoint(GetNumber(1), GetNumber(0), FXPT_BEZIERTO);
 }
 void CPDF_StreamContentParser::Handle_ConcatMatrix()
 {
     FX_FLOAT a2 = GetNumber16(5), b2 = GetNumber16(4), c2 = GetNumber16(3), d2 = GetNumber16(2);
     FX_FLOAT e2 = GetNumber(1), f2 = GetNumber(0);
-    FX_FLOAT old_width_scale = m_pCurStates->m_CTM.GetXUnit();
     CFX_AffineMatrix new_matrix(a2, b2, c2, d2, e2, f2);
     new_matrix.Concat(m_pCurStates->m_CTM);
     m_pCurStates->m_CTM = new_matrix;
-    FX_FLOAT new_width_scale = m_pCurStates->m_CTM.GetXUnit();
     OnChangeTextMatrix();
 }
 void CPDF_StreamContentParser::Handle_SetColorSpace_Fill()
 {
     if (m_Options.m_bTextOnly) {
         return;
     }
     CFX_ByteString csname = GetString(0);
     CPDF_ColorSpace* pCS = FindColorSpace(csname);
     if (pCS == NULL) {
@@ skipping 1038 matching lines @@
                 buf.AppendChar((char)code);
             }
             bFirst = !bFirst;
         }
     }
     if (!bFirst) {
         buf.AppendChar((char)code);
     }
     return buf.GetByteString();
 }