Update from https://crrev.com/306655

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 {
 namespace win {
 
-#if defined(_WIN64) && !defined(NACL_WIN64)
-// TODO(jschuh): crbug.com/167707 Make sure this is ok.
-#pragma message ("Warning: \
- This code is not tested on x64. Please make sure all the base unit tests\
- pass before doing any real work. The current unit tests don't test the\
- differences between 32- and 64-bits implementations. Bugs may slip through.\
- You need to improve the coverage before continuing.")
-#endif
+// TODO(jschuh): crbug.com/167707 Make sure this code works on 64-bit.
 
 // Structure to perform imports enumerations.
 struct EnumAllImportsStorage {
   PEImage::EnumImportsFunction callback;
   PVOID cookie;
 };
 
 namespace {
 
   // Compare two strings byte by byte on an unsigned basis.
@@ skipping 533 matching lines @@
   DWORD disk_offset;
 
   if (!ImageAddrToOnDiskOffset(in_memory, &disk_offset))
     return NULL;
 
   return PEImage::RVAToAddr(disk_offset);
 }
 
 }  // namespace win
 }  // namespace base