Add metrics for calculating precision/recall of link navigation pre-connect triggers.

chrome/browser/net/connect_interceptor.cc

Index: chrome/browser/net/connect_interceptor.cc
diff --git a/chrome/browser/net/connect_interceptor.cc b/chrome/browser/net/connect_interceptor.cc
index 4770fba96690a0e49319d6b8652882e02ef22e76..ca0b6ee78d0d57863873744f68c553075883ccf8 100644
--- a/chrome/browser/net/connect_interceptor.cc
+++ b/chrome/browser/net/connect_interceptor.cc
@@ -71,8 +71,6 @@ void ConnectInterceptor::WitnessURLRequest(net::URLRequest* request) {
   }
   timed_cache_.SetRecentlySeen(request_scheme_host);
 
-  predictor_->RecordPreconnectNavigationStats(request_scheme_host);
-
   // Subresources for main frames usually get predicted when we detected the
   // main frame request - way back in RenderViewHost::Navigate.  So only handle
   // predictions now for subresources or for redirected hosts.