Plumb connection attempts from (non-proxy) ConnectJobs to HttpNetworkTransaction.

net/http/http_transaction_test_util.h

Index: net/http/http_transaction_test_util.h
diff --git a/net/http/http_transaction_test_util.h b/net/http/http_transaction_test_util.h
index e63e433341656ce6a55444078ecbe592a742b895..163b042445bf482cb6d646d1ca082bef631c058e 100644
--- a/net/http/http_transaction_test_util.h
+++ b/net/http/http_transaction_test_util.h
@@ -24,6 +24,7 @@
 #include "net/http/http_response_headers.h"
 #include "net/http/http_response_info.h"
 #include "net/log/net_log.h"
+#include "net/socket/connection_attempts.h"
 
 namespace net {
 
@@ -218,6 +219,8 @@ class MockNetworkTransaction
 
   int ResumeNetworkStart() override;
 
+  void GetConnectionAttempts(ConnectionAttempts* out) const override;
+
   CreateHelper* websocket_handshake_stream_create_helper() {
     return websocket_handshake_stream_create_helper_;
   }