Add experiment to measure time to hash extension content as we read it

net/net.gypi

 # 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.
 
 {
   'variables': {
     # Subset of net source files that are compiled for NaCl (net_nacl target).
     # These files must not depend on files listed in sources list in the net
     # target.
     'net_nacl_common_sources' : [
@@ skipping 1620 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',
       'tools/tld_cleanup/tld_cleanup_util_unittest.cc',
       'udp/udp_socket_unittest.cc',
       'url_request/url_fetcher_impl_unittest.cc',
       'url_request/url_fetcher_response_writer_unittest.cc',
       'url_request/url_request_context_builder_unittest.cc',
+      'url_request/url_request_file_job_unittest.cc',
       'url_request/url_request_filter_unittest.cc',
       'url_request/url_request_ftp_job_unittest.cc',
       'url_request/url_request_http_job_unittest.cc',
       'url_request/url_request_job_factory_impl_unittest.cc',
       'url_request/url_request_job_unittest.cc',
       'url_request/url_request_simple_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',
@@ skipping 54 matching lines @@
       'tools/quic/test_tools/quic_test_client.h',
       'tools/quic/test_tools/quic_test_utils.cc',
       'tools/quic/test_tools/quic_test_utils.h',
       'tools/quic/test_tools/server_thread.h',
       'tools/quic/test_tools/server_thread.cc',
       'tools/quic/test_tools/simple_client.h',
       'tools/quic/test_tools/simple_client.cc',
     ],
   }
 }