IPC: Make ipc_perftests run on Android.

base/test/multiprocess_test_android.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/posix/global_descriptors.h"
 #include "base/test/multiprocess_test.h"
 
 #include <unistd.h>
 
 #include "base/containers/hash_tables.h"
 #include "base/logging.h"
 #include "testing/multiprocess_func_list.h"
 
 namespace base {
 
@@ skipping 20 matching lines @@
   if (pid > 0) {
     // Parent process.
     return pid;
   }
   // Child process.
   std::hash_set<int> fds_to_keep_open;
   for (FileHandleMappingVector::const_iterator it = fds_to_remap->begin();
        it != fds_to_remap->end(); ++it) {
     fds_to_keep_open.insert(it->first);
   }
-  // Keep stdin, stdout and stderr open since this is not meant to spawn a
-  // daemon.
-  const int kFdForAndroidLogging = 3;  // FD used by __android_log_write().
-  for (int fd = kFdForAndroidLogging + 1; fd < getdtablesize(); ++fd) {
+  // Keep standard FDs (stdin, stdout, stderr, etc.) open since this
+  // is not meant to spawn a daemon.
+  int base = GlobalDescriptors::kBaseDescriptor;
+  for (int fd = base; fd < getdtablesize(); ++fd) {
     if (fds_to_keep_open.find(fd) == fds_to_keep_open.end()) {
       close(fd);
     }
   }
   for (FileHandleMappingVector::const_iterator it = fds_to_remap->begin();
        it != fds_to_remap->end(); ++it) {
     int old_fd = it->first;
     int new_fd = it->second;
     if (dup2(old_fd, new_fd) < 0) {
       PLOG(FATAL) << "dup2";
     }
     close(old_fd);
   }
   _exit(multi_process_function_list::InvokeChildProcessTest(procname));
   return 0;
 }
 
 }  // namespace base