Implement nextHopProtocol in PerformanceResourceTiming and PerformanceNavigationTiming.

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

Index: third_party/WebKit/Source/core/timing/PerformanceResourceTiming.cpp
diff --git a/third_party/WebKit/Source/core/timing/PerformanceResourceTiming.cpp b/third_party/WebKit/Source/core/timing/PerformanceResourceTiming.cpp
index bc8441f93083ed1450207b77a167a1a936e177f3..bdf3e3dab1ae3f4efdb9c050309178cb13adcdd6 100644
--- a/third_party/WebKit/Source/core/timing/PerformanceResourceTiming.cpp
+++ b/third_party/WebKit/Source/core/timing/PerformanceResourceTiming.cpp
@@ -62,6 +62,8 @@ PerformanceResourceTiming::PerformanceResourceTiming(
           monotonicTimeToDOMHighResTimeStamp(timeOrigin,
                                              info.loadFinishTime())),
       m_initiatorType(info.initiatorType()),
+      m_nextHopProtocol(info.finalResponse().alpnNegotiatedProtocol()),
+      m_connectionInfo(info.finalResponse().connectionInfo()),
       m_timeOrigin(timeOrigin),
       m_timing(info.finalResponse().resourceLoadTiming()),
       m_lastRedirectEndTime(lastRedirectEndTime),
@@ -75,10 +77,28 @@ PerformanceResourceTiming::PerformanceResourceTiming(
 
 PerformanceResourceTiming::~PerformanceResourceTiming() {}
 
+AtomicString PerformanceResourceTiming::produceNextHopProtocol(
+    const AtomicString& alpnNegotiatedProtocol,
+    const AtomicString& connectionInfo) {
+  AtomicString returnedProtocol = alpnNegotiatedProtocol == "unknown"
+                                      ? connectionInfo
+                                      : alpnNegotiatedProtocol;
+  returnedProtocol =
+      returnedProtocol == "unknown" ? "http/1.1" : returnedProtocol;

[panicker, 2016/10/24 18:23:31]

I don't think we can assume http1 version here.

[sunjian, 2016/10/25 00:10:55]

Talked off line. Agreed to set it to be "http/1.1" when both
alpnNegotiatedProtocol and connectionInfo happen to be unknown.

+  returnedProtocol =
+      returnedProtocol == "quic/1+spdy/3" ? "http2/+quic/35" : returnedProtocol;

[panicker, 2016/10/24 18:23:31]

cannot assume quic version

[sunjian, 2016/10/25 00:10:55]

Done.

+  return returnedProtocol;
+}
+
 AtomicString PerformanceResourceTiming::initiatorType() const {
   return m_initiatorType;
 }
 
+AtomicString PerformanceResourceTiming::nextHopProtocol() const {
+  return PerformanceResourceTiming::produceNextHopProtocol(m_nextHopProtocol,
+                                                           m_connectionInfo);
+}
+
 double PerformanceResourceTiming::workerStart() const {
   if (!m_timing || m_timing->workerStart() == 0.0)
     return 0.0;