Remove navigation_service_unittests, along with the service itself.

tools/determinism/deterministic_build_whitelist.pyl

 # Copyright 2016 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.
 #
 # This is a .pyl, or "Python Literal", file. You can treat it just like a
 # .json file, with the following exceptions:
 # * all keys must be quoted (use single quotes, please);
 # * comments are allowed, using '#' syntax; and
 # * trailing commas are allowed.
 #
@@ skipping 278 matching lines @@
     'mus_demo_library.dll',
     'mus_demo_unittests.exe',
     'mus_gpu_unittests.exe',
     'mus_ime_unittests.exe',
     'mus_public_unittests.exe',
     'nacl_irt_x86_32.nexe',
     'nacl_irt_x86_64.nexe',
     'nacl_loader_unittests.exe',
     'native_theme_unittests.exe',
     'navigation.exe',
-    'navigation_unittests.exe',
     'net_perftests.exe',
     'net_unittests.exe',
     'next_version_mini_installer.exe',
     'pdfium_embeddertests.exe',
     'pdfium_test.exe',
     'performance_browser_tests.exe',
     'power_saver_test_plugin.dll',
     'ppapi_nacl_tests_newlib_x86_32.nexe',
     'ppapi_nacl_tests_newlib_x86_64.nexe',
     'ppapi_nacl_tests_pnacl_newlib_x32.nexe',
@@ skipping 54 matching lines @@
     'views_mus_interactive_ui_tests.exe',
     'views_mus_unittests.exe',
     'views_unittests.exe',
     'webkit_unit_tests.exe',
     'webtest_library.dll',
     'window_type_launcher_library.dll',
     'wm_unittests.exe',
     'wtf_unittests.exe',
   ],
 }