Plumb ConnectionAttempts from HttpNetworkTransaction to URLRequest.

net/url_request/url_request_job.h

Index: net/url_request/url_request_job.h
diff --git a/net/url_request/url_request_job.h b/net/url_request/url_request_job.h
index b6ae4bbeb13af7129c5d875c019962cf94b672de..709b741eb475e9321d00cb87be42c8461c72ac08 100644
--- a/net/url_request/url_request_job.h
+++ b/net/url_request/url_request_job.h
@@ -19,6 +19,7 @@
 #include "net/base/request_priority.h"
 #include "net/base/upload_progress.h"
 #include "net/cookies/canonical_cookie.h"
+#include "net/socket/connection_attempts.h"
 #include "net/url_request/redirect_info.h"
 #include "net/url_request/url_request.h"
 #include "url/gurl.h"
@@ -226,6 +227,11 @@ class NET_EXPORT URLRequestJob
   // canceled by an explicit NetworkDelegate::NotifyURLRequestDestroyed() call.
   virtual void NotifyURLRequestDestroyed();
 
+  // Populates |out| with the vector of connection attempts made at the socket
+  // layer in the course of executing the URLRequestJob. Should be called after
+  // the response has been sent or after the connection has failed.

[Randy Smith (Not in Mondays), 2015/05/11 20:59:31]

"response has been sent".  Do you mean "response has been received" or "request
has been sent"?  On the client side, I'm not sure what "response has been sent"
means.

+  virtual void GetConnectionAttempts(ConnectionAttempts* out) const;
+
   // Given |policy|, |referrer|, and |redirect_destination|, returns the
   // referrer URL mandated by |request|'s referrer policy.
   static GURL ComputeReferrerForRedirect(URLRequest::ReferrerPolicy policy,