Re-enable several MSVC warnings

core/fxge/ge/fx_ge_path.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/fxcrt/fx_system.h"
 #include "core/include/fxge/fx_ge.h"
 #include "third_party/base/numerics/safe_math.h"
 
@@ skipping 322 matching lines @@
   FX_FLOAT join_x = (end_outside_c - start_outside_c) / (start_k - end_k);
   FX_FLOAT join_y = (start_k * join_x) + start_outside_c;
   rect.UpdateRect(join_x, join_y);
 }
 CFX_FloatRect CFX_PathData::GetBoundingBox(FX_FLOAT line_width,
                                            FX_FLOAT miter_limit) const {
   CFX_FloatRect rect(100000 * 1.0f, 100000 * 1.0f, -100000 * 1.0f,
                      -100000 * 1.0f);
   int iPoint = 0;
   FX_FLOAT half_width = line_width;
-  int iStartPoint, iEndPoint, iMiddlePoint;
+  int iStartPoint = 0;
+  int iEndPoint = 0;
+  int iMiddlePoint = 0;
   FX_BOOL bJoin;
   while (iPoint < m_PointCount) {
     if (m_pPoints[iPoint].m_Flag == FXPT_MOVETO) {
       iStartPoint = iPoint + 1;
       iEndPoint = iPoint;
       bJoin = FALSE;
     } else {
       if (m_pPoints[iPoint].m_Flag == FXPT_BEZIERTO) {
         rect.UpdateRect(m_pPoints[iPoint].m_PointX, m_pPoints[iPoint].m_PointY);
         rect.UpdateRect(m_pPoints[iPoint + 1].m_PointX,
@@ skipping 293 matching lines @@
 }
 void CFX_GraphStateData::SetDashCount(int count) {
   FX_Free(m_DashArray);
   m_DashArray = NULL;
   m_DashCount = count;
   if (count == 0) {
     return;
   }
   m_DashArray = FX_Alloc(FX_FLOAT, count);
 }