Add routine to close file descriptors on exec

base/process_util.h

Index: base/process_util.h
diff --git a/base/process_util.h b/base/process_util.h
index f00016ee165e0d2ca80765c837ff3adc1a891280..ec858bd52ce503d40cdfaa37d74893f80f09897e 100644
--- a/base/process_util.h
+++ b/base/process_util.h
@@ -67,9 +67,9 @@ ProcessHandle GetCurrentProcessHandle();
 int GetProcId(ProcessHandle process);
 
 #if defined(OS_POSIX)
-// Returns the maximum number of files that a process can have open.
-// Returns 0 on error.
-int GetMaxFilesOpenInProcess();
+// Sets all file descriptors to close on exec except for stdin, stdout
+// and stderr.
+void SetAllFDsToCloseOnExec();
 #endif
 
 #if defined(OS_WIN)