Store a stacktrace of PrefService destruction in PrefChangeRegistrar

base/prefs/pref_notifier_impl.cc

 // Copyright (c) 2012 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 "base/prefs/pref_notifier_impl.h"
 
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
 #include "base/stl_util.h"
 
@@ skipping 56 matching lines @@
   }
 
   PrefObserverList* observer_list = observer_iterator->second;
   observer_list->RemoveObserver(obs);
 }
 
 void PrefNotifierImpl::AddInitObserver(base::Callback<void(bool)> obs) {
   init_observers_.push_back(obs);
 }
 
+// TODO(battre): Delete this. See crbug.com/373435.
+void PrefNotifierImpl::SetPrefServiceDestructionTrace(
+    const std::string& stacktrace) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  for (PrefObserverMap::iterator observer_iterator = pref_observers_.begin();
+       observer_iterator != pref_observers_.end();
+       ++observer_iterator) {
+    FOR_EACH_OBSERVER(PrefObserver,
+                      *(observer_iterator->second),
+                      SetPrefServiceDestructionTrace(stacktrace));
+  }
+}
+
 void PrefNotifierImpl::OnPreferenceChanged(const std::string& path) {
   FireObservers(path);
 }
 
 void PrefNotifierImpl::OnInitializationCompleted(bool succeeded) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   // We must make a copy of init_observers_ and clear it before we run
   // observers, or we can end up in this method re-entrantly before
   // clearing the observers list.
@@ skipping 21 matching lines @@
 
   FOR_EACH_OBSERVER(PrefObserver,
                     *(observer_iterator->second),
                     OnPreferenceChanged(pref_service_, path));
 }
 
 void PrefNotifierImpl::SetPrefService(PrefService* pref_service) {
   DCHECK(pref_service_ == NULL);
   pref_service_ = pref_service;
 }