Remove usage of compat from client

util/file/file_io_posix.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 10 matching lines @@
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"
 #include "base/posix/eintr_wrapper.h"
 
 namespace {
 
 struct ReadTraits {
   using VoidBufferType = void*;
   using CharBufferType = char*;
-  static ssize_t Operate(int fd, CharBufferType buffer, size_t size) {
+  static FileOperationResult Operate(int fd,
+                                     CharBufferType buffer,
+                                     size_t size) {
     return read(fd, buffer, size);
   }
 };
 
 struct WriteTraits {
   using VoidBufferType = const void*;
   using CharBufferType = const char*;
-  static ssize_t Operate(int fd, CharBufferType buffer, size_t size) {
+  static FileOperationResult Operate(int fd,
+                                     CharBufferType buffer,
+                                     size_t size) {
     return write(fd, buffer, size);
   }
 };
 
 template <typename Traits>
-ssize_t ReadOrWrite(int fd,
-                    typename Traits::VoidBufferType buffer,
-                    size_t size) {
+FileOperationResult ReadOrWrite(int fd,
+                                typename Traits::VoidBufferType buffer,
+                                size_t size) {
   typename Traits::CharBufferType buffer_c =
       reinterpret_cast<typename Traits::CharBufferType>(buffer);
 
-  ssize_t total_bytes = 0;
+  FileOperationResult total_bytes = 0;
   while (size > 0) {
-    ssize_t bytes = HANDLE_EINTR(Traits::Operate(fd, buffer_c, size));
+    FileOperationResult bytes =
+        HANDLE_EINTR(Traits::Operate(fd, buffer_c, size));
     if (bytes < 0) {
       return bytes;
     } else if (bytes == 0) {
       break;
     }
 
     buffer_c += bytes;
     size -= bytes;
     total_bytes += bytes;
   }
@@ skipping 31 matching lines @@
   }
 
   return HANDLE_EINTR(
       open(path.value().c_str(),
            flags,
            permissions == FilePermissions::kWorldReadable ? 0644 : 0600));
 }
 
 }  // namespace
 
-ssize_t ReadFile(FileHandle file, void* buffer, size_t size) {
+FileOperationResult ReadFile(FileHandle file, void* buffer, size_t size) {
   return ReadOrWrite<ReadTraits>(file, buffer, size);
 }
 
-ssize_t WriteFile(FileHandle file, const void* buffer, size_t size) {
+FileOperationResult WriteFile(FileHandle file,
+                              const void* buffer,
+                              size_t size) {
   return ReadOrWrite<WriteTraits>(file, buffer, size);
 }
 
 FileHandle OpenFileForRead(const base::FilePath& path) {
   return HANDLE_EINTR(open(path.value().c_str(), O_RDONLY));
 }
 
 FileHandle OpenFileForWrite(const base::FilePath& path,
                             FileWriteMode mode,
                             FilePermissions permissions) {
@@ skipping 55 matching lines @@
   return true;
 }
 
 bool LoggingCloseFile(FileHandle file) {
   int rv = IGNORE_EINTR(close(file));
   PLOG_IF(ERROR, rv != 0) << "close";
   return rv == 0;
 }
 
 }  // namespace crashpad