Introduce PrefRegistrySyncable, simplifying PrefServiceSyncable.

chrome/browser/extensions/component_loader.cc

Index: chrome/browser/extensions/component_loader.cc
diff --git a/chrome/browser/extensions/component_loader.cc b/chrome/browser/extensions/component_loader.cc
index 53e7e73d5e0e28883a74e30d6e3e7bf6a0b5644e..b01dadbce39eac1cd6588ba6435bea92d0b3993d 100644
--- a/chrome/browser/extensions/component_loader.cc
+++ b/chrome/browser/extensions/component_loader.cc
@@ -12,6 +12,7 @@
 #include "base/prefs/public/pref_change_registrar.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/extension_service.h"
+#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_notification_types.h"
@@ -433,13 +434,13 @@ void ComponentLoader::UnloadComponent(ComponentExtensionInfo* component) {
 }
 
 // static
-void ComponentLoader::RegisterUserPrefs(PrefServiceSyncable* prefs) {
-  prefs->RegisterStringPref(prefs::kEnterpriseWebStoreURL,
-                            std::string() /* default_value */,
-                            PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterStringPref(prefs::kEnterpriseWebStoreName,
-                            std::string() /* default_value */,
-                            PrefServiceSyncable::UNSYNCABLE_PREF);
+void ComponentLoader::RegisterUserPrefs(PrefRegistrySyncable* registry) {
+  registry->RegisterStringPref(prefs::kEnterpriseWebStoreURL,
+                               std::string() /* default_value */,
+                               PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterStringPref(prefs::kEnterpriseWebStoreName,
+                               std::string() /* default_value */,
+                               PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 }  // namespace extensions