Allow CertNetFetcher to be shutdown from the network thread

net/tools/cert_verify_tool/verify_using_path_builder.cc

Index: net/tools/cert_verify_tool/verify_using_path_builder.cc
diff --git a/net/tools/cert_verify_tool/verify_using_path_builder.cc b/net/tools/cert_verify_tool/verify_using_path_builder.cc
index adaf5fe5d81aab62aa3d1b15f25d57e62acc3d14..bd1acc1af2e4ec13fe2dd26982eae2f0c7046b7b 100644
--- a/net/tools/cert_verify_tool/verify_using_path_builder.cc
+++ b/net/tools/cert_verify_tool/verify_using_path_builder.cc
@@ -281,6 +281,9 @@ bool VerifyUsingPathBuilder(
 
   // Initialize an AIA fetcher, that uses a separate thread for running the
   // networking message loop.
+// TODO(estark): update this code to use the new CertNetFetcher
+// interface that takes a URLRequestContext*.
+#if 0
   base::Thread::Options options(base::MessageLoop::TYPE_IO, 0);
   base::Thread thread("network_thread");
   CHECK(thread.StartWithOptions(options));
@@ -297,6 +300,7 @@ bool VerifyUsingPathBuilder(
   // Stop the temporary network thread..
   url_request_context_getter->ShutDown();
   thread.Stop();
+#endif
 
   // TODO(crbug.com/634443): Display any errors/warnings associated with path
   //                         building that were not part of a particular