Switch to standard integer types in base/files/.

base/files/memory_mapped_file.cc

 // Copyright 2013 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.
 
 #include "base/files/memory_mapped_file.h"
 
 #include <utility>
 
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/sys_info.h"
+#include "build/build_config.h"
 
 namespace base {
 
 const MemoryMappedFile::Region MemoryMappedFile::Region::kWholeFile = {0, 0};
 
 bool MemoryMappedFile::Region::operator==(
     const MemoryMappedFile::Region& other) const {
   return other.offset == offset && other.size == size;
 }
 
@@ skipping 63 matching lines @@
   const int64_t mask =
       static_cast<int64_t>(SysInfo::VMAllocationGranularity()) - 1;
   DCHECK_LT(mask, std::numeric_limits<int32_t>::max());
   *offset = start & mask;
   *aligned_start = start & ~mask;
   *aligned_size = (size + *offset + mask) & ~mask;
 }
 #endif
 
 }  // namespace base