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

net/http/http_cache_transaction.h

Index: net/http/http_cache_transaction.h
diff --git a/net/http/http_cache_transaction.h b/net/http/http_cache_transaction.h
index d9d99e35422eaf16b6deb3f4f2595ced5001abbb..c6b0bae1bf40318b62626e45fcd5490e0556f7b7 100644
--- a/net/http/http_cache_transaction.h
+++ b/net/http/http_cache_transaction.h
@@ -19,6 +19,7 @@
 #include "net/http/http_response_info.h"
 #include "net/http/http_transaction.h"
 #include "net/log/net_log.h"
+#include "net/socket/connection_attempts.h"
 
 namespace net {
 
@@ -144,6 +145,7 @@ class HttpCache::Transaction : public HttpTransaction {
   void SetBeforeProxyHeadersSentCallback(
       const BeforeProxyHeadersSentCallback& callback) override;
   int ResumeNetworkStart() override;
+  void GetConnectionAttempts(ConnectionAttempts* out) const override;
 
  private:
   static const size_t kNumValidationHeaders = 2;