components: Move PrefRegistrySyncable into user_prefs namespace.

chrome/browser/content_settings/content_settings_pref_provider.cc

Index: chrome/browser/content_settings/content_settings_pref_provider.cc
diff --git a/chrome/browser/content_settings/content_settings_pref_provider.cc b/chrome/browser/content_settings/content_settings_pref_provider.cc
index 4690f2f0595a077b3f251f94965031e9c896bed8..8f53c680f98b5e0673745f59831a7aa0c7ef0d95 100644
--- a/chrome/browser/content_settings/content_settings_pref_provider.cc
+++ b/chrome/browser/content_settings/content_settings_pref_provider.cc
@@ -72,13 +72,15 @@ namespace content_settings {
 //
 
 // static
-void PrefProvider::RegisterUserPrefs(PrefRegistrySyncable* registry) {
+void PrefProvider::RegisterUserPrefs(
+    user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterIntegerPref(
       prefs::kContentSettingsVersion,
       ContentSettingsPattern::kContentSettingsPatternVersion,
-      PrefRegistrySyncable::UNSYNCABLE_PREF);
-  registry->RegisterDictionaryPref(prefs::kContentSettingsPatternPairs,
-                                   PrefRegistrySyncable::SYNCABLE_PREF);
+      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  registry->RegisterDictionaryPref(
+      prefs::kContentSettingsPatternPairs,
+      user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
 }
 
 PrefProvider::PrefProvider(PrefService* prefs,