[Sync] Fix test support targets + duplicate namespaces.

components/history/core/browser/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.
 
 static_library("browser") {
   sources = [
     "delete_directive_handler.cc",
     "delete_directive_handler.h",
     "download_constants.h",
     "download_database.cc",
@@ skipping 188 matching lines @@
     ":browser",
     ":unit_tests_bundle_data",
     "//base",
     "//base/test:test_support",
     "//components/favicon_base",
     "//components/history/core/common",
     "//components/history/core/test",
     "//components/prefs:test_support",
     "//components/signin/core/browser",
     "//components/signin/core/browser:test_support",
-    "//components/sync:test_support_sync_driver",
-    "//components/sync:test_support_sync_model",
+    "//components/sync",
+    "//components/sync:test_support_model",
     "//sql",
     "//sql:test_support",
     "//testing/gtest",
     "//ui/gfx",
     "//ui/gfx:test_support",
     "//url",
   ]
   if (is_android) {
     sources += [ "android/android_history_types_unittest.cc" ]
   }
 }