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

chrome/browser/sync/test/integration/preferences_helper.cc

Index: chrome/browser/sync/test/integration/preferences_helper.cc
diff --git a/chrome/browser/sync/test/integration/preferences_helper.cc b/chrome/browser/sync/test/integration/preferences_helper.cc
index 8607cb2a48e479f618715e051c92e99db6c482ab..1923da494c0bec223573cdda5219609d8cc3f3f5 100644
--- a/chrome/browser/sync/test/integration/preferences_helper.cc
+++ b/chrome/browser/sync/test/integration/preferences_helper.cc
@@ -4,13 +4,13 @@
 
 #include "chrome/browser/sync/test/integration/preferences_helper.h"
 
+#include "base/prefs/pref_service.h"
 #include "base/values.h"
-#include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/profile_sync_service_harness.h"
-#include "chrome/browser/sync/test/integration/sync_test.h"
 #include "chrome/browser/sync/test/integration/sync_datatype_helper.h"
+#include "chrome/browser/sync/test/integration/sync_test.h"
 
 using sync_datatype_helper::test;