Add TrackedPreferenceValidationDelegate

chrome/browser/profiles/profile_impl.h

Index: chrome/browser/profiles/profile_impl.h
diff --git a/chrome/browser/profiles/profile_impl.h b/chrome/browser/profiles/profile_impl.h
index f002f3fbac99099929c53c50d602a96e13c88d2d..5a79369119abfa09cc1900582543f72b0f363b71 100644
--- a/chrome/browser/profiles/profile_impl.h
+++ b/chrome/browser/profiles/profile_impl.h
@@ -26,6 +26,7 @@ class PrefService;
 class PrefServiceSyncable;
 class ShortcutsBackend;
 class SSLConfigServiceManager;
+class TrackedPreferenceValidationDelegate;
 
 #if defined(OS_CHROMEOS)
 namespace chromeos {
@@ -242,6 +243,10 @@ class ProfileImpl : public Profile {
 #endif
   scoped_ptr<policy::ProfilePolicyConnector> profile_policy_connector_;
 
+  // Keep |pref_validation_delegate_| above |prefs_| so that the former outlives
+  // the latter.
+  scoped_ptr<TrackedPreferenceValidationDelegate> pref_validation_delegate_;
+
   // Keep |prefs_| on top for destruction order because |extension_prefs_|,
   // |net_pref_observer_|, |io_data_| and others store pointers to |prefs_| and
   // shall be destructed first.