Move safe_strerror to posix directory and the base namespace

base/BUILD.gn

 # Copyright (c) 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.
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")
 }
@@ skipping 353 matching lines @@
     "path_service.h",
     "pending_task.cc",
     "pending_task.h",
     "pickle.cc",
     "pickle.h",
     "port.h",
     "posix/eintr_wrapper.h",
     "posix/file_descriptor_shuffle.cc",
     "posix/global_descriptors.cc",
     "posix/global_descriptors.h",
+    "posix/safe_strerror.cc",
+    "posix/safe_strerror.h",
     "posix/unix_domain_socket_linux.cc",
     "posix/unix_domain_socket_linux.h",
     "power_monitor/power_monitor.cc",
     "power_monitor/power_monitor.h",
     "power_monitor/power_monitor_device_source.cc",
     "power_monitor/power_monitor_device_source.h",
     "power_monitor/power_monitor_device_source_android.cc",
     "power_monitor/power_monitor_device_source_android.h",
     "power_monitor/power_monitor_device_source_chromeos.cc",
     "power_monitor/power_monitor_device_source_ios.mm",
@@ skipping 17 matching lines @@
     "profiler/stack_sampling_profiler_win.cc",
     "profiler/tracked_time.cc",
     "profiler/tracked_time.h",
     "rand_util.cc",
     "rand_util.h",
     "rand_util_nacl.cc",
     "rand_util_posix.cc",
     "rand_util_win.cc",
     "run_loop.cc",
     "run_loop.h",
-    "safe_strerror_posix.cc",
-    "safe_strerror_posix.h",
     "scoped_generic.h",
     "scoped_native_library.cc",
     "scoped_native_library.h",
     "scoped_observer.h",
     "sequence_checker.h",
     "sequence_checker_impl.cc",
     "sequence_checker_impl.h",
     "sequenced_task_runner.cc",
     "sequenced_task_runner.h",
     "sequenced_task_runner_helpers.h",
@@ skipping 1088 matching lines @@
 
   # GYP: //base.gyp:base_java_unittest_support
   android_library("base_java_unittest_support") {
     deps = [
       ":base_java",
     ]
     java_files =
         [ "test/android/java/src/org/chromium/base/ContentUriTestUtils.java" ]
   }
 }