Write last_modified date to Content Settings in the PrefProvider

components/content_settings/core/browser/host_content_settings_map.cc

Index: components/content_settings/core/browser/host_content_settings_map.cc
diff --git a/components/content_settings/core/browser/host_content_settings_map.cc b/components/content_settings/core/browser/host_content_settings_map.cc
index 3879f3096c0b32f26bb8077fd333adb59a9e1e78..0657bfc066c02f5cf56269419469578492fd2698 100644
--- a/components/content_settings/core/browser/host_content_settings_map.cc
+++ b/components/content_settings/core/browser/host_content_settings_map.cc
@@ -194,8 +194,8 @@ HostContentSettingsMap::HostContentSettingsMap(PrefService* prefs,
       base::WrapUnique(policy_provider);
   policy_provider->AddObserver(this);
 
-  pref_provider_ =
-      new content_settings::PrefProvider(prefs_, is_incognito_);
+  pref_provider_ = new content_settings::PrefProvider(prefs_, is_incognito_,
+                                                      kStoreLastModified);
   content_settings_providers_[PREF_PROVIDER] = base::WrapUnique(pref_provider_);
   pref_provider_->AddObserver(this);
 
@@ -659,8 +659,8 @@ void HostContentSettingsMap::ClearSettingsForOneType(
 void HostContentSettingsMap::ClearSettingsForOneTypeWithPredicate(
     ContentSettingsType content_type,
     const base::Callback<bool(const ContentSettingsPattern& primary_pattern,
-                              const ContentSettingsPattern& secondary_pattern)>&
-        pattern_predicate) {
+                              const ContentSettingsPattern& secondary_pattern,
+                              base::Time last_modified)>& pattern_predicate) {
   if (pattern_predicate.is_null()) {
     ClearSettingsForOneType(content_type);
     return;
@@ -670,7 +670,8 @@ void HostContentSettingsMap::ClearSettingsForOneTypeWithPredicate(
   GetSettingsForOneType(content_type, std::string(), &settings);
   for (const ContentSettingPatternSource& setting : settings) {
     if (pattern_predicate.Run(setting.primary_pattern,
-                              setting.secondary_pattern)) {
+                              setting.secondary_pattern,
+                              setting.last_modified)) {
       SetWebsiteSettingCustomScope(setting.primary_pattern,
                                    setting.secondary_pattern, content_type,
                                    std::string(), nullptr);
@@ -760,6 +761,7 @@ void HostContentSettingsMap::AddSettingsForOneType(
     }
     settings->push_back(ContentSettingPatternSource(
         rule.primary_pattern, rule.secondary_pattern, setting_value,
+        rule.last_modified,
         kProviderNamesSourceMap[provider_type].provider_name, incognito));
   }
 }