Add extensions code to use common updater in components/update_client/

components/component_updater/configurator_impl.h

Index: components/component_updater/configurator_impl.h
diff --git a/components/component_updater/configurator_impl.h b/components/component_updater/configurator_impl.h
index df58473d80449c27bcffa2d13d46d7c89e428c1d..b2e75a92f208c4d783bf52f4022a323067268742 100644
--- a/components/component_updater/configurator_impl.h
+++ b/components/component_updater/configurator_impl.h
@@ -77,6 +77,11 @@ class ConfiguratorImpl {
   // non on-demand components.
   bool UseBackgroundDownloader() const;
 
+  // Setting this to false means that we'll only use secure transport (eg https)
+  // for update/ping urls. This is already false by default everywhere but older
+  // versions of Windows XP.
+  void set_enable_alt_source_url(bool enable_alt_source_url);
+
  private:
   net::URLRequestContextGetter* url_request_getter_;
   std::string extra_info_;