Add "Site Settings" option to Clear Browsing Data on Android

components/content_settings/core/browser/host_content_settings_map.h

Index: components/content_settings/core/browser/host_content_settings_map.h
diff --git a/components/content_settings/core/browser/host_content_settings_map.h b/components/content_settings/core/browser/host_content_settings_map.h
index 63c23d59a8061ae5bb8845bc9ff1f3441a2826c0..4d219c19a5bd9646815cd9e28492fc891e0173cd 100644
--- a/components/content_settings/core/browser/host_content_settings_map.h
+++ b/components/content_settings/core/browser/host_content_settings_map.h
@@ -218,6 +218,16 @@ class HostContentSettingsMap : public content_settings::Observer,
   // This should only be called on the UI thread.
   void ClearSettingsForOneType(ContentSettingsType content_type);
 
+  // Return the |last_modified| date of a content setting. This will only return
+  // valid values for settings from the PreferenceProvider. Settings from other
+  // providers will return base::Time().
+  //
+  // This may be called on any thread.
+  base::Time GetSettingLastModifiedDate(
+      const ContentSettingsPattern& primary_pattern,
+      const ContentSettingsPattern& secondary_pattern,
+      ContentSettingsType content_type) const;
+
   using PatternSourcePredicate =
       base::Callback<bool(const ContentSettingsPattern& primary_pattern,
                           const ContentSettingsPattern& secondary_pattern)>;