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

chrome/browser/autofill/autofill_common_test.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/autofill/autofill_common_test.h"
 
 #include "base/prefs/pref_service.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/autofill/autofill_profile.h"
 #include "chrome/browser/autofill/credit_card.h"
 #include "chrome/browser/password_manager/encryptor.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/form_field_data.h"
 #include "chrome/common/pref_names.h"
+#include "components/user_prefs/user_prefs.h"
 
 namespace autofill_test {
 
 void CreateTestFormField(const char* label,
                          const char* name,
                          const char* value,
                          const char* type,
                          FormFieldData* field) {
   field->label = ASCIIToUTF16(label);
   field->name = ASCIIToUTF16(name);
@@ skipping 51 matching lines @@
 
 void DisableSystemServices(Profile* profile) {
   // Use a mock Keychain rather than the OS one to store credit card data.
 #if defined(OS_MACOSX)
   Encryptor::UseMockKeychain(true);
 #endif
 
   // Disable auxiliary profiles for unit testing.  These reach out to system
   // services on the Mac.
   if (profile) {
-    PrefServiceFromBrowserContext(profile)->SetBoolean(
+    components::UserPrefs::Get(profile)->SetBoolean(
         prefs::kAutofillAuxiliaryProfilesEnabled, false);
   }
 }
 
 }  // namespace autofill_test