Add an automatic settings reset banner.

chrome/browser/prefs/tracked/tracked_split_preference.cc

 // Copyright 2014 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 "chrome/browser/prefs/tracked/tracked_split_preference.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "base/values.h"
@@ skipping 46 matching lines @@
     if (value_state == PrefHashStore::CHANGED) {
       DCHECK(!invalid_keys.empty());
 
       for (std::vector<std::string>::const_iterator it =
                invalid_keys.begin(); it != invalid_keys.end(); ++it) {
         dict_value->Remove(*it, NULL);
       }
     } else {
       pref_store_contents->RemovePath(pref_path_, NULL);
     }
+    pref_hash_store_->RecordResetEvent();
   }
 
   if (value_state != PrefHashStore::UNCHANGED) {
     // Store the hash for the new value (whether it was reset or not).
     const base::DictionaryValue* new_dict_value = NULL;
     pref_store_contents->GetDictionary(pref_path_, &new_dict_value);
     pref_hash_store_->StoreSplitHash(pref_path_, new_dict_value);
   }
 }