Write last_modified date to Content Settings in the PrefProvider

components/content_settings/core/common/content_settings.h

 // Copyright (c) 2011 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.
 
 #ifndef COMPONENTS_CONTENT_SETTINGS_CORE_COMMON_CONTENT_SETTINGS_H_
 #define COMPONENTS_CONTENT_SETTINGS_CORE_COMMON_CONTENT_SETTINGS_H_
 
 #include <stddef.h>
 
 #include <string>
 #include <vector>
 
+#include "base/time/time.h"
 #include "components/content_settings/core/common/content_settings_pattern.h"
 #include "components/content_settings/core/common/content_settings_types.h"
 
 // Different settings that can be assigned for a particular content type.  We
 // give the user the ability to set these on a global and per-origin basis.
 // A Java counterpart will be generated for this enum.
 // GENERATED_JAVA_ENUM_PACKAGE: org.chromium.chrome.browser.preferences.website
 // GENERATED_JAVA_CLASS_NAME_OVERRIDE: ContentSettingValues
 //
 // TODO(nigeltao): migrate the Java users of this enum to the mojom-generated
@@ skipping 14 matching lines @@
 
 // Converts a given content setting to its histogram value, for use when saving
 // content settings types to a histogram.
 int ContentSettingTypeToHistogramValue(ContentSettingsType content_setting,
                                        size_t* num_values);
 
 struct ContentSettingPatternSource {
   ContentSettingPatternSource(const ContentSettingsPattern& primary_pattern,
                               const ContentSettingsPattern& secondary_patttern,
                               ContentSetting setting,
+                              base::Time last_modified,
                               const std::string& source,
                               bool incognito);
   ContentSettingPatternSource(const ContentSettingPatternSource& other);
   ContentSettingPatternSource();
   ContentSettingsPattern primary_pattern;
   ContentSettingsPattern secondary_pattern;
   ContentSetting setting;
+  base::Time last_modified;
   std::string source;
   bool incognito;
 };
 
 typedef std::vector<ContentSettingPatternSource> ContentSettingsForOneType;
 
 struct RendererContentSettingRules {
   RendererContentSettingRules();
   ~RendererContentSettingRules();
   ContentSettingsForOneType image_rules;
@@ skipping 23 matching lines @@
 // contains the patterns of the appling rule.
 struct SettingInfo {
   SettingSource source;
   ContentSettingsPattern primary_pattern;
   ContentSettingsPattern secondary_pattern;
 };
 
 }  // namespace content_settings
 
 #endif  // COMPONENTS_CONTENT_SETTINGS_CORE_COMMON_CONTENT_SETTINGS_H_