components: Move PrefRegistrySyncable into user_prefs namespace.

chrome/browser/extensions/default_apps.cc

Index: chrome/browser/extensions/default_apps.cc
diff --git a/chrome/browser/extensions/default_apps.cc b/chrome/browser/extensions/default_apps.cc
index 3ecf9a0b5a252cabd2c8a3e7effb06ed804bbc50..f5892517741356ffce270ac1d15bd1ca0b77e120 100644
--- a/chrome/browser/extensions/default_apps.cc
+++ b/chrome/browser/extensions/default_apps.cc
@@ -7,9 +7,6 @@
 #include "base/command_line.h"
 #include "chrome/browser/browser_process.h"
 #include "components/user_prefs/pref_registry_syncable.h"
-#if !defined(OS_ANDROID)
-#include "chrome/browser/first_run/first_run.h"
-#endif
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_switches.h"
@@ -18,6 +15,10 @@
 #include "chrome/common/pref_names.h"
 #include "ui/base/l10n/l10n_util.h"
 
+#if !defined(OS_ANDROID)
+#include "chrome/browser/first_run/first_run.h"
+#endif
+
 namespace {
 
 const char kGmailId[] = "pjkljhegncpnkpknbcohdijeoejaedia";
@@ -49,9 +50,11 @@ bool IsLocaleSupported() {
 
 namespace default_apps {
 
-void RegisterUserPrefs(PrefRegistrySyncable* registry) {
-  registry->RegisterIntegerPref(prefs::kDefaultAppsInstallState, kUnknown,
-                                PrefRegistrySyncable::UNSYNCABLE_PREF);
+void RegisterUserPrefs(user_prefs::PrefRegistrySyncable* registry) {
+  registry->RegisterIntegerPref(
+      prefs::kDefaultAppsInstallState,
+      kUnknown,
+      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 bool Provider::ShouldInstallInProfile() {