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 2cc599083cad6c55c83b06936c960e09ff788f8f..4981778da98f562d876cdb305730b437f8a6547b 100644
--- a/net/http/http_network_transaction_unittest.cc
+++ b/net/http/http_network_transaction_unittest.cc
@@ -12714,6 +12714,11 @@ class FakeStreamRequest : public HttpStreamRequest,
 
   bool using_spdy() const override { return false; }
 
+  const ConnectionAttempts& connection_attempts() const override {
+    static ConnectionAttempts no_attempts;
+    return no_attempts;
+  }
+
  private:
   RequestPriority priority_;
   HttpStreamRequest::Delegate* const delegate_;