Add QUIC v40 which will be used to include changes:

chrome/browser/page_load_metrics/observers/protocol_page_load_metrics_observer.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/page_load_metrics/observers/protocol_page_load_metrics_observer.h"
 
 #include "chrome/browser/page_load_metrics/page_load_metrics_util.h"
 
 page_load_metrics::PageLoadMetricsObserver::ObservePolicy
 ProtocolPageLoadMetricsObserver::OnStart(
@@ skipping 42 matching lines @@
       break;
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_UNKNOWN_VERSION:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_32:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_33:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_34:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_35:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_36:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_37:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_38:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_39:
+    case net::HttpResponseInfo::CONNECTION_INFO_QUIC_40:
       PAGE_LOAD_HISTOGRAM(
           "PageLoad.Clients.Protocol.QUIC.ParseTiming.NavigationToParseStart",
           timing.parse_timing.parse_start.value());
       break;
   }
 }
 
 void ProtocolPageLoadMetricsObserver::OnFirstContentfulPaint(
     const page_load_metrics::PageLoadTiming& timing,
     const page_load_metrics::PageLoadExtraInfo& extra_info) {
@@ skipping 31 matching lines @@
       break;
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_UNKNOWN_VERSION:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_32:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_33:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_34:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_35:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_36:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_37:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_38:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_39:
+    case net::HttpResponseInfo::CONNECTION_INFO_QUIC_40:
       PAGE_LOAD_HISTOGRAM(
           "PageLoad.Clients.Protocol.QUIC.PaintTiming."
           "NavigationToFirstContentfulPaint",
           timing.paint_timing.first_contentful_paint.value());
       PAGE_LOAD_HISTOGRAM(
           "PageLoad.Clients.Protocol.QUIC.PaintTiming."
           "ParseStartToFirstContentfulPaint",
           timing.paint_timing.first_contentful_paint.value() -
               timing.parse_timing.parse_start.value());
       break;
@@ skipping 37 matching lines @@
       break;
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_UNKNOWN_VERSION:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_32:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_33:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_34:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_35:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_36:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_37:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_38:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_39:
+    case net::HttpResponseInfo::CONNECTION_INFO_QUIC_40:
       PAGE_LOAD_HISTOGRAM(
           "PageLoad.Clients.Protocol.QUIC.Experimental.PaintTiming."
           "NavigationToFirstMeaningfulPaint",
           timing.paint_timing.first_meaningful_paint.value());
       PAGE_LOAD_HISTOGRAM(
           "PageLoad.Clients.Protocol.QUIC.Experimental.PaintTiming."
           "ParseStartToFirstMeaningfulPaint",
           timing.paint_timing.first_meaningful_paint.value() -
               timing.parse_timing.parse_start.value());
       break;
@@ skipping 27 matching lines @@
       break;
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_UNKNOWN_VERSION:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_32:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_33:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_34:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_35:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_36:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_37:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_38:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_39:
+    case net::HttpResponseInfo::CONNECTION_INFO_QUIC_40:
       PAGE_LOAD_HISTOGRAM(
           "PageLoad.Clients.Protocol.QUIC.DocumentTiming."
           "NavigationToDOMContentLoadedEventFired",
           timing.document_timing.dom_content_loaded_event_start.value());
       break;
   }
 }
 
 void ProtocolPageLoadMetricsObserver::OnLoadEventStart(
     const page_load_metrics::PageLoadTiming& timing,
@@ skipping 22 matching lines @@
       break;
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_UNKNOWN_VERSION:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_32:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_33:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_34:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_35:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_36:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_37:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_38:
     case net::HttpResponseInfo::CONNECTION_INFO_QUIC_39:
+    case net::HttpResponseInfo::CONNECTION_INFO_QUIC_40:
       PAGE_LOAD_HISTOGRAM(
           "PageLoad.Clients.Protocol.QUIC.DocumentTiming."
           "NavigationToLoadEventFired",
           timing.document_timing.load_event_start.value());
       break;
   }
 }