Introduce PrefRegistrySyncable, simplifying PrefServiceSyncable.

chrome/browser/plugins/plugin_prefs_factory.cc

Index: chrome/browser/plugins/plugin_prefs_factory.cc
diff --git a/chrome/browser/plugins/plugin_prefs_factory.cc b/chrome/browser/plugins/plugin_prefs_factory.cc
index e1e3ba941907d6ca60d85e817e03918b87441d1a..005fe6e8a587cedd8907ceb64a52da83e2e147f2 100644
--- a/chrome/browser/plugins/plugin_prefs_factory.cc
+++ b/chrome/browser/plugins/plugin_prefs_factory.cc
@@ -6,6 +6,7 @@
 
 #include "base/path_service.h"
 #include "chrome/browser/plugins/plugin_prefs.h"
+#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_dependency_manager.h"
@@ -47,29 +48,29 @@ PluginPrefsFactory::BuildServiceInstanceFor(Profile* profile) const {
   return plugin_prefs;
 }
 
-void PluginPrefsFactory::RegisterUserPrefs(PrefServiceSyncable* prefs) {
+void PluginPrefsFactory::RegisterUserPrefs(PrefRegistrySyncable* registry) {
   FilePath internal_dir;
   PathService::Get(chrome::DIR_INTERNAL_PLUGINS, &internal_dir);
-  prefs->RegisterFilePathPref(prefs::kPluginsLastInternalDirectory,
-                              internal_dir,
-                              PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kPluginsEnabledInternalPDF,
-                             false,
-                             PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kPluginsEnabledNaCl,
-                             false,
-                             PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterBooleanPref(prefs::kPluginsMigratedToPepperFlash,
-                             false,
-                             PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterListPref(prefs::kPluginsPluginsList,
-                          PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterListPref(prefs::kPluginsDisabledPlugins,
-                          PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterListPref(prefs::kPluginsDisabledPluginsExceptions,
-                          PrefServiceSyncable::UNSYNCABLE_PREF);
-  prefs->RegisterListPref(prefs::kPluginsEnabledPlugins,
-                          PrefServiceSyncable::UNSYNCABLE_PREF);
+  registry->RegisterFilePathPref(prefs::kPluginsLastInternalDirectory,
+                                 internal_dir,
+                                 PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kPluginsEnabledInternalPDF,
+                                false,
+                                PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kPluginsEnabledNaCl,
+                                false,
+                                PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterBooleanPref(prefs::kPluginsMigratedToPepperFlash,
+                                false,
+                                PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterListPref(prefs::kPluginsPluginsList,
+                             PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterListPref(prefs::kPluginsDisabledPlugins,
+                             PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterListPref(prefs::kPluginsDisabledPluginsExceptions,
+                             PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterListPref(prefs::kPluginsEnabledPlugins,
+                             PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 bool PluginPrefsFactory::ServiceRedirectedInIncognito() const {