Make ProcessWatcher use kqueues on Mac.

chrome/common/process_watcher_unittest.cc

+// Copyright (c) 2009 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 "chrome/common/process_watcher.h"
+
+#if defined(OS_POSIX)
+#include <sys/wait.h>
+
+#include "base/eintr_wrapper.h"
+#include "base/multiprocess_test.h"
+#include "base/process_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+class ProcessWatcherTest : public MultiProcessTest {
+};
+
+namespace {
+
+bool IsProcessDead(base::ProcessHandle child) {
+  // waitpid() will actually reap the process which is exactly NOT what we
+  // want to test for.  The good thing is that if it can't find the process
+  // we'll get a nice value for errno which we can test for.
+  const pid_t result = HANDLE_EINTR(waitpid(child, NULL, WNOHANG));
+  return result == -1 && errno == ECHILD;
+}
+
+}  // namespace
+
+TEST_F(ProcessWatcherTest, DelayedTermination) {
+  base::ProcessHandle child_process =
+      SpawnChild(L"process_watcher_test_never_die");
+  ProcessWatcher::EnsureProcessTerminated(child_process);
+  base::WaitForSingleProcess(child_process, 5000);
+
+  // Check that process was really killed.
+  EXPECT_TRUE(IsProcessDead(child_process));
+  base::CloseProcessHandle(child_process);
+}
+
+MULTIPROCESS_TEST_MAIN(process_watcher_test_never_die) {
+  while(1){
+    sleep(500);
+  }
+  return 0;
+}
+
+#endif  // OS_POSIX