Move remaining non-test, non-Chrome-specific Prefs code to base/prefs/.

chrome/browser/policy/url_blacklist_manager.cc

Index: chrome/browser/policy/url_blacklist_manager.cc
diff --git a/chrome/browser/policy/url_blacklist_manager.cc b/chrome/browser/policy/url_blacklist_manager.cc
index 6b33dc2e2ef25ca78793eacb4c881a8791050f05..a91134e6302ab01badd5fd4221fcb0a5ccafde4e 100644
--- a/chrome/browser/policy/url_blacklist_manager.cc
+++ b/chrome/browser/policy/url_blacklist_manager.cc
@@ -6,12 +6,12 @@
 
 #include "base/bind.h"
 #include "base/message_loop.h"
+#include "base/prefs/pref_service.h"
 #include "base/stl_util.h"
 #include "base/string_number_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/net/url_fixer_upper.h"
 #include "chrome/browser/prefs/pref_registry_syncable.h"
-#include "chrome/browser/prefs/pref_service.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/browser/browser_thread.h"