Remove duplicated user_prefs::TestingPrefServiceSyncable

components/sync/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/buildflag_header.gni")
 import("//build/config/features.gni")
 import("//components/sync/protocol/protocol_sources.gni")
 import("//testing/test.gni")
 
 static_library("sync") {
@@ skipping 938 matching lines @@
   deps = [
     ":sync",
     ":test_support_base",
     ":test_support_driver",
     ":test_support_engine",
     ":test_support_model",
     "//base",
     "//base/test:test_support",
     "//components/invalidation/impl",
     "//components/os_crypt:test_support",
-    "//components/pref_registry:test_support",
     "//components/prefs:test_support",
     "//components/signin/core/browser:test_support",
     "//components/sync/engine_impl/attachments/proto",
     "//components/sync_preferences",
     "//components/sync_preferences:test_support",
     "//components/version_info",
     "//google_apis",
     "//google_apis:test_support",
     "//net",
     "//net:test_support",
@@ skipping 167 matching lines @@
     deps = [
       ":fake_server_jni",
       ":sync",
       ":test_support_fake_server",
       "//base",
       "//testing/gtest",
       "//url:url",
     ]
   }
 }