Implement nextHopProtocol in PerformanceResourceTiming and PerformanceNavigationTiming.

content/public/renderer/document_state.h

Index: content/public/renderer/document_state.h
diff --git a/content/public/renderer/document_state.h b/content/public/renderer/document_state.h
index 7da18d8e411f3de2aeb37bf9b8f1940d8ea9e37e..b50775f0a3e2c50497b284ee781184b150083629 100644
--- a/content/public/renderer/document_state.h
+++ b/content/public/renderer/document_state.h
@@ -149,11 +149,10 @@ class CONTENT_EXPORT DocumentState
     was_alternate_protocol_available_ = value;
   }
 
-  net::HttpResponseInfo::ConnectionInfo connection_info() const {
+  std::string connection_info() const {
     return connection_info_;
   }
-  void set_connection_info(
-      net::HttpResponseInfo::ConnectionInfo connection_info) {
+  void set_connection_info(const std::string& connection_info) {
     connection_info_ = connection_info;
   }
 
@@ -200,7 +199,7 @@ class CONTENT_EXPORT DocumentState
   bool was_alpn_negotiated_;
   std::string alpn_negotiated_protocol_;
   bool was_alternate_protocol_available_;
-  net::HttpResponseInfo::ConnectionInfo connection_info_;
+  std::string connection_info_;
 
   bool was_load_data_with_base_url_request_;
   GURL data_url_;