Refactor preference syncing.

chrome/browser/plugin_updater.cc

Index: chrome/browser/plugin_updater.cc
diff --git a/chrome/browser/plugin_updater.cc b/chrome/browser/plugin_updater.cc
index 95c2c5fac209fec52f87c381a5a6a09d6ab1a655..7961a1cfb18ca8b4a537ac2dae61a5d24545764a 100644
--- a/chrome/browser/plugin_updater.cc
+++ b/chrome/browser/plugin_updater.cc
@@ -339,8 +339,12 @@ void PluginUpdater::RegisterPrefs(PrefService* prefs) {
   FilePath internal_dir;
   PathService::Get(chrome::DIR_INTERNAL_PLUGINS, &internal_dir);
   prefs->RegisterFilePathPref(prefs::kPluginsLastInternalDirectory,
-                              internal_dir);
-  prefs->RegisterListPref(prefs::kPluginsDisabledPlugins);
-  prefs->RegisterListPref(prefs::kPluginsDisabledPluginsExceptions);
-  prefs->RegisterListPref(prefs::kPluginsEnabledPlugins);
+                              internal_dir,
+                              false /* don't sync pref */);
+  prefs->RegisterListPref(prefs::kPluginsDisabledPlugins,
+                          false /* don't sync pref */);
+  prefs->RegisterListPref(prefs::kPluginsDisabledPluginsExceptions,
+                          false /* don't sync pref */);
+  prefs->RegisterListPref(prefs::kPluginsEnabledPlugins,
+                          false /* don't sync pref */);
 }