Plumb SSLKEYLOGFILE from Cronet to net

components/cronet/android/cronet_url_request_context_adapter.cc

Index: components/cronet/android/cronet_url_request_context_adapter.cc
diff --git a/components/cronet/android/cronet_url_request_context_adapter.cc b/components/cronet/android/cronet_url_request_context_adapter.cc
index b02bd141639fb9d4b2d01e13d64d8c36ec4fafa2..fcc1ea7bf6b39c9185944a9e8e242a8b90724378 100644
--- a/components/cronet/android/cronet_url_request_context_adapter.cc
+++ b/components/cronet/android/cronet_url_request_context_adapter.cc
@@ -434,7 +434,8 @@ void CronetURLRequestContextAdapter::InitializeOnNetworkThread(
   context_builder.set_proxy_service(
       net::ProxyService::CreateWithoutProxyResolver(
           std::move(proxy_config_service_), net_log_.get()));
-  config->ConfigureURLRequestContextBuilder(&context_builder, net_log_.get());
+  config->ConfigureURLRequestContextBuilder(&context_builder, net_log_.get(),
+                                            GetFileThread()->task_runner());
 
   // Set up pref file if storage path is specified.
   if (!config->storage_path.empty()) {