Add support for ProxyResolverErrorObserver to ProxyResolverMojo.

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 1460 matching lines @@
       'proxy/mojo_proxy_resolver_impl_unittest.cc',
       'proxy/multi_threaded_proxy_resolver_unittest.cc',
       'proxy/network_delegate_error_observer_unittest.cc',
       'proxy/proxy_bypass_rules_unittest.cc',
       'proxy/proxy_config_service_android_unittest.cc',
       'proxy/proxy_config_service_linux_unittest.cc',
       'proxy/proxy_config_service_win_unittest.cc',
       'proxy/proxy_config_unittest.cc',
       'proxy/proxy_info_unittest.cc',
       'proxy/proxy_list_unittest.cc',
+      'proxy/proxy_resolver_error_observer_mojo_unittest.cc',
       'proxy/proxy_resolver_mojo_unittest.cc',
       'proxy/proxy_resolver_factory_unittest.cc',
       'proxy/proxy_resolver_v8_tracing_unittest.cc',
       'proxy/proxy_resolver_v8_unittest.cc',
       'proxy/proxy_script_decider_unittest.cc',
       'proxy/proxy_script_fetcher_impl_unittest.cc',
       'proxy/proxy_server_unittest.cc',
       'proxy/proxy_service_mojo_unittest.cc',
       'proxy/proxy_service_unittest.cc',
       'quic/congestion_control/cubic_bytes_test.cc',
@@ skipping 321 matching lines @@
       'base/mac/url_conversions_unittest.mm',
     ],
     'net_docs_script': 'tools/net_docs/net_docs.py',
     'net_docs_sources': [
       'README.md',
       'sdch/README.md',
     ],
     'net_docs_output_dir': '<(PRODUCT_DIR)/net/docs',
   }
 }