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 aa1697483294bacbd641d580fc734200609885bc..7b35cb02131f0715891ea51037956097209731e9 100644
--- a/net/http/http_network_transaction_unittest.cc
+++ b/net/http/http_network_transaction_unittest.cc
@@ -12645,6 +12645,12 @@ 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_;