Implement nextHopProtocol in PerformanceResourceTiming and PerformanceNavigationTiming.

chrome/renderer/loadtimes_extension_bindings.cc

Index: chrome/renderer/loadtimes_extension_bindings.cc
diff --git a/chrome/renderer/loadtimes_extension_bindings.cc b/chrome/renderer/loadtimes_extension_bindings.cc
index 39a248ab73d6c702f56a700bd98a1ef70d637034..ceefc506fe7fc685bcd9460c6bc61b554cc5c084 100644
--- a/chrome/renderer/loadtimes_extension_bindings.cc
+++ b/chrome/renderer/loadtimes_extension_bindings.cc
@@ -173,8 +173,7 @@ class LoadTimesExtensionWrapper : public v8::Extension {
         document_state->alpn_negotiated_protocol();
     bool was_alternate_protocol_available =
         document_state->was_alternate_protocol_available();
-    std::string connection_info = net::HttpResponseInfo::ConnectionInfoToString(
-        document_state->connection_info());
+    std::string connection_info = document_state->connection_info();
 
     // Important: |frame|, |data_source| and |document_state| should not be
     // referred to below this line, as JS setters below can invalidate these