Remove usage of compat from client

util/file/file_io_win.cc

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 54 matching lines @@
                     nullptr,
                     disposition,
                     FILE_ATTRIBUTE_NORMAL,
                     nullptr);
 }
 
 }  // namespace
 
 // TODO(scottmg): Handle > DWORD sized writes if necessary.
 
-ssize_t ReadFile(FileHandle file, void* buffer, size_t size) {
+FileOperationResult ReadFile(FileHandle file, void* buffer, size_t size) {
   DCHECK(!IsSocketHandle(file));
   DWORD size_dword = base::checked_cast<DWORD>(size);
   DWORD total_read = 0;
   char* buffer_c = reinterpret_cast<char*>(buffer);
   while (size_dword > 0) {
     DWORD bytes_read;
     BOOL success = ::ReadFile(file, buffer_c, size_dword, &bytes_read, nullptr);
     if (!success) {
       if (GetLastError() == ERROR_BROKEN_PIPE) {
         // When reading a pipe and the write handle has been closed, ReadFile
@@ skipping 10 matching lines @@
       break;
     }
 
     buffer_c += bytes_read;
     size_dword -= bytes_read;
     total_read += bytes_read;
   }
   return total_read;
 }
 
-ssize_t WriteFile(FileHandle file, const void* buffer, size_t size) {
+FileOperationResult WriteFile(FileHandle file,
+                              const void* buffer,
+                              size_t size) {
   // TODO(scottmg): This might need to handle the limit for pipes across a
   // network in the future.
   DWORD size_dword = base::checked_cast<DWORD>(size);
   DWORD bytes_written;
   BOOL rv = ::WriteFile(file, buffer, size_dword, &bytes_written, nullptr);
   if (!rv)
     return -1;
   CHECK_EQ(bytes_written, size_dword);
   return bytes_written;
 }
@@ skipping 111 matching lines @@
   return true;
 }
 
 bool LoggingCloseFile(FileHandle file) {
   BOOL rv = CloseHandle(file);
   PLOG_IF(ERROR, !rv) << "CloseHandle";
   return rv;
 }
 
 }  // namespace crashpad