components: Move PrefRegistrySyncable into user_prefs namespace.

chrome/browser/renderer_host/pepper/device_id_fetcher.cc

Index: chrome/browser/renderer_host/pepper/device_id_fetcher.cc
diff --git a/chrome/browser/renderer_host/pepper/device_id_fetcher.cc b/chrome/browser/renderer_host/pepper/device_id_fetcher.cc
index 669815617381bfee27957cb896f9d7efa73c9cc3..79285a63733f4a5f8eb3dc399bfb54fc858c8da2 100644
--- a/chrome/browser/renderer_host/pepper/device_id_fetcher.cc
+++ b/chrome/browser/renderer_host/pepper/device_id_fetcher.cc
@@ -63,13 +63,17 @@ void DeviceIDFetcher::Start(BrowserPpapiHost* browser_host) {
 }
 
 // static
-void DeviceIDFetcher::RegisterUserPrefs(PrefRegistrySyncable* prefs) {
+void DeviceIDFetcher::RegisterUserPrefs(
+    user_prefs::PrefRegistrySyncable* prefs) {
   // TODO(wad): Once UI is connected, a final default can be set. At that point
   // change this pref from UNSYNCABLE to SYNCABLE.
-  prefs->RegisterBooleanPref(prefs::kEnableDRM, true,
-                             PrefRegistrySyncable::UNSYNCABLE_PREF);
-  prefs->RegisterStringPref(prefs::kDRMSalt, "",
-                            PrefRegistrySyncable::UNSYNCABLE_PREF);
+  prefs->RegisterBooleanPref(prefs::kEnableDRM,
+                             true,
+                             user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
+  prefs->RegisterStringPref(
+      prefs::kDRMSalt,
+      "",
+      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 // static