Write last_modified date to Content Settings in the PrefProvider

chrome/browser/extensions/api/content_settings/content_settings_store.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 "chrome/browser/extensions/api/content_settings/content_settings_store.h"
 
 #include <algorithm>
 #include <memory>
 #include <set>
 #include <utility>
@@ skipping 91 matching lines @@
     ContentSettingsType type,
     const content_settings::ResourceIdentifier& identifier,
     ContentSetting setting,
     ExtensionPrefsScope scope) {
   {
     base::AutoLock lock(lock_);
     OriginIdentifierValueMap* map = GetValueMap(ext_id, scope);
     if (setting == CONTENT_SETTING_DEFAULT) {
       map->DeleteValue(primary_pattern, secondary_pattern, type, identifier);
     } else {
+      // Do not set a timestamp for extension settings.
+      base::Time last_modified;
       map->SetValue(primary_pattern, secondary_pattern, type, identifier,
-                    new base::Value(setting));
+                    last_modified, new base::Value(setting));
     }
   }
 
   // Send notification that content settings changed. (Note: This is responsible
   // for updating the pref store, so cannot be skipped even if the setting would
   // be masked by another extension.)
   NotifyOfContentSettingChanged(ext_id,
                                 scope != kExtensionPrefsScopeRegular);
 }
 
@@ skipping 259 matching lines @@
 
 ContentSettingsStore::ExtensionEntries::iterator
 ContentSettingsStore::FindIterator(const std::string& ext_id) {
   return std::find_if(entries_.begin(), entries_.end(),
                       [ext_id](const std::unique_ptr<ExtensionEntry>& entry) {
                         return entry->id == ext_id;
                       });
 }
 
 }  // namespace extensions