Mac: ensure child processes are properly reaped -- eliminate Helper zombies.

chrome/common/process_watcher_unittest.cc

Index: chrome/common/process_watcher_unittest.cc
diff --git a/chrome/common/process_watcher_unittest.cc b/chrome/common/process_watcher_unittest.cc
index 505a468770ce927602aedf73d9b9b3ad768db2ee..af4aaa2443c237a97e4ceb72d7871ece6118a483 100644
--- a/chrome/common/process_watcher_unittest.cc
+++ b/chrome/common/process_watcher_unittest.cc
@@ -39,10 +39,26 @@ TEST_F(ProcessWatcherTest, DelayedTermination) {
 }
 
 MULTIPROCESS_TEST_MAIN(process_watcher_test_never_die) {
-  while(1){
+  while (1) {
     sleep(500);
   }
   return 0;
 }
 
+TEST_F(ProcessWatcherTest, ImmediateTermination) {
+  base::ProcessHandle child_process =
+      SpawnChild(L"process_watcher_test_die_immediately");
+  // Give it time to die.
+  sleep(2);
+  ProcessWatcher::EnsureProcessTerminated(child_process);
+
+  // Check that process was really killed.
+  EXPECT_TRUE(IsProcessDead(child_process));
+  base::CloseProcessHandle(child_process);
+}
+
+MULTIPROCESS_TEST_MAIN(process_watcher_test_die_immediately) {
+  return 0;
+}
+
 #endif  // OS_POSIX