components: Move PrefRegistrySyncable into user_prefs namespace.

chrome/browser/chromeos/proxy_config_service_impl.h

Index: chrome/browser/chromeos/proxy_config_service_impl.h
diff --git a/chrome/browser/chromeos/proxy_config_service_impl.h b/chrome/browser/chromeos/proxy_config_service_impl.h
index 873af939cfba21a5923783a181c90fae8092d59e..730e003bd968005b9da7a81f12f217f4f9cc42e4 100644
--- a/chrome/browser/chromeos/proxy_config_service_impl.h
+++ b/chrome/browser/chromeos/proxy_config_service_impl.h
@@ -15,7 +15,10 @@
 #include "chrome/browser/net/pref_proxy_config_tracker_impl.h"
 
 class PrefRegistrySimple;
+
+namespace user_prefs {
 class PrefRegistrySyncable;
+}
 
 namespace chromeos {
 
@@ -33,10 +36,9 @@ namespace chromeos {
 // - provides UI with methods to retrieve and modify proxy configuration for
 //   any remembered network (either currently active or non-active) of current
 //   user profile
-class ProxyConfigServiceImpl
-    : public PrefProxyConfigTrackerImpl,
-      public NetworkLibrary::NetworkManagerObserver,
-      public NetworkLibrary::NetworkObserver {
+class ProxyConfigServiceImpl : public PrefProxyConfigTrackerImpl,
+                               public NetworkLibrary::NetworkManagerObserver,
+                               public NetworkLibrary::NetworkObserver {
  public:
   // ProxyConfigServiceImpl is created in ProxyServiceFactory::
   // CreatePrefProxyConfigTrackerImpl via Profile::GetProxyConfigTracker() for
@@ -203,7 +205,7 @@ class ProxyConfigServiceImpl
 
   // Register UseShardProxies preference.
   static void RegisterPrefs(PrefRegistrySimple* registry);
-  static void RegisterUserPrefs(PrefRegistrySyncable* registry);
+  static void RegisterUserPrefs(user_prefs::PrefRegistrySyncable* registry);
 
 #if defined(UNIT_TEST)
   void SetTesting(ProxyConfig* test_config) {