Remove HTTP pipelining support.

chrome/chrome_tests_unit.gypi

 # Copyright 2012 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.
 {
   'targets': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 1087 matching lines @@
         'browser/metrics/variations/variations_seed_store_unittest.cc',
         'browser/metrics/variations/variations_service_unittest.cc',
         'browser/net/chrome_fraudulent_certificate_reporter_unittest.cc',
         'browser/net/chrome_network_delegate_unittest.cc',
         'browser/net/client_hints_unittest.cc',
         'browser/net/connection_tester_unittest.cc',
         'browser/net/dns_probe_runner_unittest.cc',
         'browser/net/dns_probe_service_unittest.cc',
         'browser/net/evicted_domain_cookie_counter_unittest.cc',
         'browser/net/firefox_proxy_settings_unittest.cc',
-        'browser/net/http_pipelining_compatibility_client_unittest.cc',
         'browser/net/http_server_properties_manager_unittest.cc',
         'browser/net/net_error_tab_helper_unittest.cc',
         'browser/net/net_log_temp_file_unittest.cc',
         'browser/net/network_stats_unittest.cc',
         'browser/net/predictor_unittest.cc',
         'browser/net/pref_proxy_config_tracker_impl_unittest.cc',
         'browser/net/probe_message_unittest.cc',
         'browser/net/proxy_policy_handler_unittest.cc',
         'browser/net/spdyproxy/data_reduction_proxy_chrome_configurator_unittest.cc',
         'browser/net/spdyproxy/data_reduction_proxy_settings_unittest_android.cc',
@@ skipping 1709 matching lines @@
             'unit_tests.isolate',
           ],
           'sources': [
             'unit_tests.isolate',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }