Turned job_factory into a pure virtual class

net/net.gyp

 # Copyright (c) 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.
 
 {
   'variables': {
     'chromium_code': 1,
 
     'linux_link_kerberos%': 0,
     'conditions': [
@@ skipping 758 matching lines @@
         'url_request/url_request_filter.cc',
         'url_request/url_request_filter.h',
         'url_request/url_request_ftp_job.cc',
         'url_request/url_request_ftp_job.h',
         'url_request/url_request_http_job.cc',
         'url_request/url_request_http_job.h',
         'url_request/url_request_job.cc',
         'url_request/url_request_job.h',
         'url_request/url_request_job_factory.cc',
         'url_request/url_request_job_factory.h',
+        'url_request/url_request_job_factory_impl.cc',
+        'url_request/url_request_job_factory_impl.h',
         'url_request/url_request_job_manager.cc',
         'url_request/url_request_job_manager.h',
         'url_request/url_request_netlog_params.cc',
         'url_request/url_request_netlog_params.h',
         'url_request/url_request_redirect_job.cc',
         'url_request/url_request_redirect_job.h',
         'url_request/url_request_simple_job.cc',
         'url_request/url_request_simple_job.h',
         'url_request/url_request_status.h',
         'url_request/url_request_test_job.cc',
@@ skipping 559 matching lines @@
         'tools/dump_cache/url_to_filename_encoder.h',
         'tools/dump_cache/url_to_filename_encoder_unittest.cc',
         'tools/dump_cache/url_utilities.h',
         'tools/dump_cache/url_utilities.cc',
         'tools/dump_cache/url_utilities_unittest.cc',
         'udp/udp_socket_unittest.cc',
         'url_request/url_fetcher_impl_unittest.cc',
         'url_request/url_request_context_builder_unittest.cc',
         'url_request/url_request_filter_unittest.cc',
         'url_request/url_request_ftp_job_unittest.cc',
-        'url_request/url_request_job_factory_unittest.cc',
+        'url_request/url_request_job_factory_impl_unittest.cc',
         'url_request/url_request_job_unittest.cc',
         'url_request/url_request_throttler_simulation_unittest.cc',
         'url_request/url_request_throttler_test_support.cc',
         'url_request/url_request_throttler_test_support.h',
         'url_request/url_request_throttler_unittest.cc',
         'url_request/url_request_unittest.cc',
         'url_request/view_cache_helper_unittest.cc',
         'websockets/websocket_frame_parser_unittest.cc',
         'websockets/websocket_frame_unittest.cc',
         'websockets/websocket_handshake_handler_unittest.cc',
@@ skipping 727 matching lines @@
                 '--result', '<@(_outputs)',
                 '--isolate', 'net_unittests.isolate',
               ],
             },
           ],
         },
       ],
     }],
   ],
 }