Implement nextHopProtocol in PerformanceResourceTiming and PerformanceNavigationTiming.

third_party/WebKit/public/platform/WebURLResponse.h

Index: third_party/WebKit/public/platform/WebURLResponse.h
diff --git a/third_party/WebKit/public/platform/WebURLResponse.h b/third_party/WebKit/public/platform/WebURLResponse.h
index d0be07f4eee5729d54b5bfef6feddcf5f1bbad19..7554123cda21bec321c1a72f25f61638a88a2ebb 100644
--- a/third_party/WebKit/public/platform/WebURLResponse.h
+++ b/third_party/WebKit/public/platform/WebURLResponse.h
@@ -281,6 +281,10 @@ class WebURLResponse {
   BLINK_PLATFORM_EXPORT WebString remoteIPAddress() const;
   BLINK_PLATFORM_EXPORT void setRemoteIPAddress(const WebString&);
 
+  // ALPN negotiated protocol of the socket which fetched this resource.
+  BLINK_PLATFORM_EXPORT WebString alpnNegotiatedProtocol() const;
+  BLINK_PLATFORM_EXPORT void setALPNNegotiatedProtocol(const WebString&);
+
   // Remote port number of the socket which fetched this resource.
   BLINK_PLATFORM_EXPORT unsigned short remotePort() const;
   BLINK_PLATFORM_EXPORT void setRemotePort(unsigned short);