Send SIGTERM and SIGABRT signals to a process group

session_manager_service.cc

Index: session_manager_service.cc
diff --git a/session_manager_service.cc b/session_manager_service.cc
index 4f074f40eabfaeb9c74eac0e8b07bd7625567994..3a499f42ee9ead3ae03272102d47aa3c3797059f 100644
--- a/session_manager_service.cc
+++ b/session_manager_service.cc
@@ -830,9 +830,9 @@ void SessionManagerService::CleanupChildren(int timeout) {
   for (size_t i_child = 0; i_child < child_pids_.size(); ++i_child) {
     int child_pid = child_pids_[i_child];
     if (child_pid > 0) {
-      system_->kill(child_pid, (session_started_ ? SIGTERM: SIGKILL));
+      system_->kill(-child_pid, (session_started_ ? SIGTERM : SIGKILL));
       if (!system_->ChildIsGone(child_pid, timeout))
-        system_->kill(child_pid, SIGABRT);
+        system_->kill(-child_pid, SIGABRT);
     }
   }
 }