Remove FXSYS_Mul.

core/src/fxge/win32/fx_win32_gdipext.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/include/fxge/fx_ge.h"
 
 #if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_DESKTOP_
 #include <windows.h>
@@ skipping 1069 matching lines @@
     int pair1 = pairs[i * 2];
     int pair2 = pairs[i * 2 + 1];
     FX_FLOAT x1 = points[pair1].X, x2 = points[pair2].X;
     FX_FLOAT y1 = points[pair1].Y, y2 = points[pair2].Y;
     if (pMatrix) {
       pMatrix->Transform(x1, y1);
       pMatrix->Transform(x2, y2);
     }
     FX_FLOAT dx = x1 - x2;
     FX_FLOAT dy = y1 - y2;
-    FX_FLOAT distance_square = FXSYS_Mul(dx, dx) + FXSYS_Mul(dy, dy);
+    FX_FLOAT distance_square = (dx * dx) + (dy * dy);
     if (distance_square < (1.0f * 2 + 1.0f / 4)) {
       v1 = i;
       v2 = pair1;
       return TRUE;
     }
   }
   return FALSE;
 }
 FX_BOOL CGdiplusExt::DrawPath(HDC hDC,
                               const CFX_PathData* pPathData,
@@ skipping 406 matching lines @@
                    dest_pitch);
     }
   }
   CFX_DIBitmap* pDIBitmap = _FX_WindowsDIB_LoadFromBuf(
       pInfo->pbmi, pData, pInfo->pbmi->bmiHeader.biBitCount == 32);
   FX_Free(pData);
   FreeDIBitmap(pInfo);
   return pDIBitmap;
 }
 #endif