Use NESTABLE_ASYNC APIs to get NetLog data into Tracing

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.
 
 # This file is shared between the regular GYP build, the NaCl GYP build, and
 # the GN build. For GN support, it must have no conditionals or anything like
 # that beyond the simple one-level-deep dictionary of values.
 {
   'variables': {
     # Subset of net source files that are compiled for NaCl (net_nacl target).
@@ skipping 246 matching lines @@
       'base/request_priority.cc',
       'base/request_priority.h',
       'base/sdch_dictionary_fetcher.cc',
       'base/sdch_dictionary_fetcher.h',
       'base/sdch_manager.cc',
       'base/sdch_manager.h',
       'base/static_cookie_policy.cc',
       'base/static_cookie_policy.h',
       'base/test_data_stream.cc',
       'base/test_data_stream.h',
+      'base/trace_net_log_observer.cc',
+      'base/trace_net_log_observer.h',
       'base/upload_bytes_element_reader.cc',
       'base/upload_bytes_element_reader.h',
       'base/upload_data_stream.cc',
       'base/upload_data_stream.h',
       'base/upload_element.cc',
       'base/upload_element.h',
       'base/upload_element_reader.cc',
       'base/upload_element_reader.h',
       'base/upload_file_element_reader.cc',
       'base/upload_file_element_reader.h',
@@ skipping 1454 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',
     ],
   }
 }