Add a single site view page to view and modify content settings.

chrome/browser/content_settings/host_content_settings_map.h

Index: chrome/browser/content_settings/host_content_settings_map.h
diff --git a/chrome/browser/content_settings/host_content_settings_map.h b/chrome/browser/content_settings/host_content_settings_map.h
index bde5461a411ff31fb4888ed386dee58959964d13..f1ff86e0fd01ebfe07249dca19123bb6da5f2f1c 100644
--- a/chrome/browser/content_settings/host_content_settings_map.h
+++ b/chrome/browser/content_settings/host_content_settings_map.h
@@ -147,6 +147,16 @@ class HostContentSettingsMap
                          const std::string& resource_identifier,
                          base::Value* value);
 
+  // Sets the most specific rule that currently defines the permission for the
+  // given permission type.
+  void SetNarrowestWebsiteSetting(
+      const ContentSettingsPattern& primary_pattern,
+      const ContentSettingsPattern& secondary_pattern,
+      ContentSettingsType content_type,
+      const std::string& resource_identifier,
+      ContentSetting setting,
+      content_settings::SettingInfo existing_info);
+
   // Convenience method to add a content setting for the given URLs, making sure
   // that there is no setting overriding it.
   //