Suppress VS 2015 pointer truncation warning.

base/win/pe_image.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file implements PEImage, a generic class to manipulate PE files.
 // This file was adapted from GreenBorder's Code.
 
 #include "base/win/pe_image.h"
 
 namespace base {
@@ skipping 550 matching lines @@
 bool PEImage::ImageAddrToOnDiskOffset(LPVOID address,
                                       DWORD *on_disk_offset) const {
   if (NULL == address)
     return false;
 
   // Get the section that this address belongs to.
   PIMAGE_SECTION_HEADER section_header = GetImageSectionFromAddr(address);
   if (NULL == section_header)
     return false;
 
-#pragma warning(push)
-#pragma warning(disable: 4311)
+#pragma warning(suppress : 4302) // pointer truncation
   // These casts generate warnings because they are 32 bit specific.
   // Don't follow the virtual RVAToAddr, use the one on the base.
   DWORD offset_within_section = reinterpret_cast<DWORD>(address) -
                                     reinterpret_cast<DWORD>(PEImage::RVAToAddr(
                                         section_header->VirtualAddress));
-#pragma warning(pop)
 
   *on_disk_offset = section_header->PointerToRawData + offset_within_section;
   return true;
 }
 
 PVOID PEImage::RVAToAddr(DWORD rva) const {
   if (rva == 0)
     return NULL;
 
   return reinterpret_cast<char*>(module_) + rva;
 }
 
 PVOID PEImageAsData::RVAToAddr(DWORD rva) const {
   if (rva == 0)
     return NULL;
 
   PVOID in_memory = PEImage::RVAToAddr(rva);
   DWORD disk_offset;
 
   if (!ImageAddrToOnDiskOffset(in_memory, &disk_offset))
     return NULL;
 
   return PEImage::RVAToAddr(disk_offset);
 }
 
 }  // namespace win
 }  // namespace base