Use the location where FileDescriptorWatcher is created to track the libevent handlers

chrome/common/service_process_util_posix.cc

Index: chrome/common/service_process_util_posix.cc
diff --git a/chrome/common/service_process_util_posix.cc b/chrome/common/service_process_util_posix.cc
index b372856032fdd04612a9a508cffe91dc193b90c7..451f395adc7fc34e75c8655ba48066e831837fa0 100644
--- a/chrome/common/service_process_util_posix.cc
+++ b/chrome/common/service_process_util_posix.cc
@@ -80,7 +80,8 @@ static void SigTermHandler(int sig, siginfo_t* info, void* uap) {
   }
 }
 
-ServiceProcessState::StateData::StateData() : set_action(false) {
+ServiceProcessState::StateData::StateData()
+    : watcher(FROM_HERE), set_action(false) {
   memset(sockets, -1, sizeof(sockets));
   memset(&old_action, 0, sizeof(old_action));
 }