Add Prerender type to NavigationType for nav timing 2

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

 // 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 "core/timing/PerformanceNavigationTiming.h"
 
 #include "bindings/core/v8/V8ObjectBuilder.h"
 #include "core/timing/PerformanceBase.h"
 
 namespace blink {
@@ skipping 103 matching lines @@
 
 double PerformanceNavigationTiming::loadEventStart() const {
   return monotonicTimeToDOMHighResTimeStamp(m_timeOrigin, m_loadEventStart);
 }
 
 double PerformanceNavigationTiming::loadEventEnd() const {
   return monotonicTimeToDOMHighResTimeStamp(m_timeOrigin, m_loadEventEnd);
 }
 
 AtomicString PerformanceNavigationTiming::type() const {
-  // TODO(sunjian) Right now NavigationType doesn't seem to have a Prerender
-  // type yet, need to look into this crbug/663217
   switch (m_type) {
-    case NavigationTypeReload:
+    case NavigationType::Reload:
       return "reload";
-    case NavigationTypeBackForward:
+    case NavigationType::BackForward:
       return "back_forward";
-    default:
+    case NavigationType::Prerender:
+      return "prerender";
+    case NavigationType::Navigate:
       return "navigate";
   }
+  NOTREACHED();
+  return "navigate";
 }
 
 unsigned short PerformanceNavigationTiming::redirectCount() const {
   // TODO(sunjian): Also check response headers to allow opt-in crbugs/665160
   if (m_hasCrossOriginRedirect)
     return 0;
   return m_redirectCount;
 }
 
 double PerformanceNavigationTiming::fetchStart() const {
@@ skipping 24 matching lines @@
   builder.addNumber("domInteractive", domInteractive());
   builder.addNumber("domContentLoadedEventStart", domContentLoadedEventStart());
   builder.addNumber("domContentLoadedEventEnd", domContentLoadedEventEnd());
   builder.addNumber("domComplete", domComplete());
   builder.addNumber("loadEventStart", loadEventStart());
   builder.addNumber("loadEventEnd", loadEventEnd());
   builder.addString("type", type());
   builder.addNumber("redirectCount", redirectCount());
 }
 }