POSIX: don't spawn zombies.

base/process_posix.cc

Index: base/process_posix.cc
diff --git a/base/process_posix.cc b/base/process_posix.cc
index ff8cf92c52e79ebf1534e85b77b9f4ad4a4e1df8..c9a7dfcea0a5fa174a74cdc20906d90be442433a 100644
--- a/base/process_posix.cc
+++ b/base/process_posix.cc
@@ -18,8 +18,9 @@ void Process::Terminate(int result_code) {
   // result_code isn't supportable.
   if (!process_)
     return;
-  // Wait so we clean up the zombie
-  KillProcess(process_, result_code, true);
+  // We don't wait here. It's the responsibility of other code to reap the
+  // child.
+  KillProcess(process_, result_code, false);
 }
 
 bool Process::IsProcessBackgrounded() const {