Refactor net::NetLog to provide implementation of observer pattern, not just the interface.

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 923 matching lines @@
         'browser/metrics/thread_watcher_unittest.cc',
         'browser/metrics/time_ticks_experiment_unittest.cc',
         'browser/metrics/variations/variations_service_unittest.cc',
         'browser/metrics/variations/resource_request_allowed_notifier_test_util.cc',
         'browser/metrics/variations/resource_request_allowed_notifier_test_util.h',
         'browser/metrics/variations/resource_request_allowed_notifier_unittest.cc',
         'browser/nacl_host/nacl_file_host_unittest.cc',
         'browser/nacl_host/nacl_validation_cache_unittest.cc',
         'browser/nacl_host/pnacl_translation_cache_unittest.cc',
         'browser/net/chrome_fraudulent_certificate_reporter_unittest.cc',
-        'browser/net/chrome_net_log_unittest.cc',
         'browser/net/chrome_network_delegate_unittest.cc',
         'browser/net/connection_tester_unittest.cc',
         'browser/net/dns_probe_job_unittest.cc',
         'browser/net/dns_probe_service_unittest.cc',
         'browser/net/evicted_domain_cookie_counter_unittest.cc',
         'browser/net/gaia/gaia_oauth_fetcher_unittest.cc',
         'browser/net/http_pipelining_compatibility_client_unittest.cc',
         'browser/net/http_server_properties_manager_unittest.cc',
         'browser/net/net_log_logger_unittest.cc',
         'browser/net/net_log_temp_file_unittest.cc',
@@ skipping 1598 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/unit_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }