Store a stacktrace of PrefService destruction in PrefChangeRegistrar

base/prefs/pref_notifier_impl.h

Index: base/prefs/pref_notifier_impl.h
diff --git a/base/prefs/pref_notifier_impl.h b/base/prefs/pref_notifier_impl.h
index 655203d06dbc767bdbff76bb569ebe8380a82f95..6234896f5ab42fd10c9c144b7d5a00195982dceb 100644
--- a/base/prefs/pref_notifier_impl.h
+++ b/base/prefs/pref_notifier_impl.h
@@ -39,6 +39,11 @@ class BASE_PREFS_EXPORT PrefNotifierImpl
 
   void SetPrefService(PrefService* pref_service);
 
+  // PrefNotifier overrides.

[engedy, 2014/05/16 15:19:58]

I might be missing something, but could we not just move this a further down and
group it with the other overrides?

[battre, 2014/05/16 15:58:37]

Done. I need to cast at the caller site now, but that's fine by me.

+  // TODO(battre): Delete this. See crbug.com/373435.
+  virtual void SetPrefServiceDestructionTrace(
+      const std::string& stacktrace) OVERRIDE;
+
  protected:
   // PrefNotifier overrides.
   virtual void OnPreferenceChanged(const std::string& pref_name) OVERRIDE;