POSIX: allow WaitableEvents to be deleted while watching them.

base/waitable_event_watcher_unittest.cc

Index: base/waitable_event_watcher_unittest.cc
diff --git a/base/waitable_event_watcher_unittest.cc b/base/waitable_event_watcher_unittest.cc
index 44b9b89ca7c39b88394398b3ded6c6a85bd21ff3..049de38802319a0915fd7a03b133fcbdde20b87f 100644
--- a/base/waitable_event_watcher_unittest.cc
+++ b/base/waitable_event_watcher_unittest.cc
@@ -107,6 +107,22 @@ void RunTest_OutlivesMessageLoop(MessageLoop::Type message_loop_type) {
   }
 }
 
+void RunTest_DeleteUnder(MessageLoop::Type message_loop_type) {
+  // Delete the WaitableEvent out from under the Watcher. This is explictly
+  // allowed by the interface.
+
+  MessageLoop message_loop(message_loop_type);
+
+  {
+    WaitableEventWatcher watcher;
+
+    WaitableEvent* event = new WaitableEvent(false, false);
+    QuitDelegate delegate;
+    watcher.StartWatching(event, &delegate);
+    delete event;
+  }
+}
+
 }  // namespace
 
 //-----------------------------------------------------------------------------
@@ -134,3 +150,9 @@ TEST(WaitableEventWatcherTest, OutlivesMessageLoop) {
   RunTest_OutlivesMessageLoop(MessageLoop::TYPE_IO);
   RunTest_OutlivesMessageLoop(MessageLoop::TYPE_UI);
 }
+
+TEST(WaitableEventWatcherTest, DeleteUnder) {
+  RunTest_DeleteUnder(MessageLoop::TYPE_DEFAULT);
+  RunTest_DeleteUnder(MessageLoop::TYPE_IO);
+  RunTest_DeleteUnder(MessageLoop::TYPE_UI);
+}