Move Posix file utils to the base namespace.

base/linux_util.cc

 // Copyright (c) 2012 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/linux_util.h"
 
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <stdlib.h>
@@ skipping 269 matching lines @@
   scoped_ptr<char[]> syscall_data(new char[expected_data.length()]);
   for (std::vector<pid_t>::const_iterator
        i = tids.begin(); i != tids.end(); ++i) {
     const pid_t current_tid = *i;
     snprintf(buf, sizeof(buf), "/proc/%d/task/%d/syscall", pid, current_tid);
     int fd = open(buf, O_RDONLY);
     if (fd < 0)
       continue;
     if (syscall_supported != NULL)
       *syscall_supported = true;
-    bool read_ret =
-        file_util::ReadFromFD(fd, syscall_data.get(), expected_data.length());
+    bool read_ret = ReadFromFD(fd, syscall_data.get(), expected_data.length());
     close(fd);
     if (!read_ret)
       continue;
 
     if (0 == strncmp(expected_data.c_str(), syscall_data.get(),
                      expected_data.length())) {
       return current_tid;
     }
   }
   return -1;
 }
 
 }  // namespace base