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

net/http/http_network_transaction_unittest.cc

Index: net/http/http_network_transaction_unittest.cc
diff --git a/net/http/http_network_transaction_unittest.cc b/net/http/http_network_transaction_unittest.cc
index a3a96c44b0ad6123adc544ebd0f40bcca4de9832..eb1df4c5e83bf6133b7821ce19a6e0301d653fc3 100644
--- a/net/http/http_network_transaction_unittest.cc
+++ b/net/http/http_network_transaction_unittest.cc
@@ -12717,6 +12717,12 @@ class FakeStreamRequest : public HttpStreamRequest,
 
   bool using_spdy() const override { return false; }
 
+  const ClientSocketHandle::ConnectionAttempts& connection_attempts()
+      const override {
+    static ClientSocketHandle::ConnectionAttempts no_attempts;
+    return no_attempts;
+  }
+
  private:
   RequestPriority priority_;
   HttpStreamRequest::Delegate* const delegate_;