Define EnabledComponentUpdates group policy for the component updater.

chrome/browser/component_updater/chrome_component_updater_configurator.h

Index: chrome/browser/component_updater/chrome_component_updater_configurator.h
diff --git a/chrome/browser/component_updater/chrome_component_updater_configurator.h b/chrome/browser/component_updater/chrome_component_updater_configurator.h
index 674059ccf173bd364753b7ae9a274482ff7d7bee..19eaffff4fb5be1cc2dc46737ef542aa15169047 100644
--- a/chrome/browser/component_updater/chrome_component_updater_configurator.h
+++ b/chrome/browser/component_updater/chrome_component_updater_configurator.h
@@ -8,6 +8,7 @@
 #include "base/memory/ref_counted.h"
 #include "components/update_client/configurator.h"
 
+class PrefRegistrySimple;
 class PrefService;
 
 namespace base {
@@ -20,6 +21,13 @@ class URLRequestContextGetter;
 
 namespace component_updater {
 
+// Registers preferences associated with the component updater configurator
+// for Chrome. The preferences must be registered with the local pref store
+// before they can be queried by the configurator instance.
+// This function is called before MakeChromeComponentUpdaterConfigurator.
+void RegisterPrefsForChromeComponentUpdaterConfigurator(
+    PrefRegistrySimple* registry);
+
 scoped_refptr<update_client::Configurator>
 MakeChromeComponentUpdaterConfigurator(
     const base::CommandLine* cmdline,