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

chrome/browser/extensions/component_loader_unittest.cc

Index: chrome/browser/extensions/component_loader_unittest.cc
diff --git a/chrome/browser/extensions/component_loader_unittest.cc b/chrome/browser/extensions/component_loader_unittest.cc
index 7cd8271220b8b9d8a215699c84c9ddac034b21e2..0f685ff270565f873dcceb405a73d76665f1e0c4 100644
--- a/chrome/browser/extensions/component_loader_unittest.cc
+++ b/chrome/browser/extensions/component_loader_unittest.cc
@@ -10,12 +10,12 @@
 #include "base/path_service.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "chrome/browser/extensions/test_extension_service.h"
-#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_set.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/testing_pref_service_syncable.h"
+#include "components/user_prefs/pref_registry_syncable.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using extensions::Extension;