Implement nextHopProtocol in PerformanceResourceTiming and PerformanceNavigationTiming.

third_party/WebKit/Source/core/timing/PerformanceResourceTiming.h

Index: third_party/WebKit/Source/core/timing/PerformanceResourceTiming.h
diff --git a/third_party/WebKit/Source/core/timing/PerformanceResourceTiming.h b/third_party/WebKit/Source/core/timing/PerformanceResourceTiming.h
index 7723329ec3732903820b88eeb3c31efede15dea3..2e281cb3a3bfa220bead0b163448115fe59c0d15 100644
--- a/third_party/WebKit/Source/core/timing/PerformanceResourceTiming.h
+++ b/third_party/WebKit/Source/core/timing/PerformanceResourceTiming.h
@@ -65,7 +65,7 @@ class PerformanceResourceTiming final : public PerformanceEntry {
   }
 
   AtomicString initiatorType() const;
-
+  AtomicString nextHopProtocol() const;
   double workerStart() const;
   double redirectStart() const;
   double redirectEnd() const;
@@ -94,9 +94,15 @@ class PerformanceResourceTiming final : public PerformanceEntry {
                             bool m_allowRedirectDetails);
   ~PerformanceResourceTiming() override;
 
+  static AtomicString produceNextHopProtocol(
+      const AtomicString& alpnNegotiatedProtocol,
+      const AtomicString& connectionInfo);
+
   double workerReady() const;
 
   AtomicString m_initiatorType;
+  AtomicString m_nextHopProtocol;
+  AtomicString m_connectionInfo;
   double m_timeOrigin;
   RefPtr<ResourceLoadTiming> m_timing;
   double m_lastRedirectEndTime;