Introduce //components/user_prefs, use to eliminate c/b/prefs dependency in Autofill.

chrome/browser/signin/about_signin_internals_factory.cc

Index: chrome/browser/signin/about_signin_internals_factory.cc
diff --git a/chrome/browser/signin/about_signin_internals_factory.cc b/chrome/browser/signin/about_signin_internals_factory.cc
index 6f9bd88897f09a19c0a3d94034848c0f55ef7a01..ccce353befeb3cb14d264d4fd03c80ae70b62280 100644
--- a/chrome/browser/signin/about_signin_internals_factory.cc
+++ b/chrome/browser/signin/about_signin_internals_factory.cc
@@ -5,12 +5,12 @@
 #include "chrome/browser/signin/about_signin_internals_factory.h"
 
 #include "base/prefs/pref_service.h"
-#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/profiles/profile_dependency_manager.h"
 #include "chrome/browser/signin/about_signin_internals.h"
 #include "chrome/browser/signin/signin_internals_util.h"
 #include "chrome/browser/signin/token_service_factory.h"
 #include "chrome/common/pref_names.h"
+#include "components/user_prefs/pref_registry_syncable.h"
 #include "google_apis/gaia/gaia_constants.h"
 
 using namespace signin_internals_util;