Report nav timing 2 instance as soon as it's requested.

third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.h

Index: third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.h
diff --git a/third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.h b/third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.h
index 8e47ccb2e3c325349a02dafa5f234703df0acd47..0c730f05169a3d2af94f4f80b08e3d1315359cca 100644
--- a/third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.h
+++ b/third_party/WebKit/Source/platform/loader/fetch/ResourceFetcher.h
@@ -142,6 +142,7 @@ class PLATFORM_EXPORT ResourceFetcher
   void reloadLoFiImages();
 
   // Calling this method before main document resource is fetched is invalid.
+  // This method should only be called once.

[Kunihiko Sakamoto, 2017/02/13 08:22:29]

Now this can be called multiple times safely.

[sunjian, 2017/02/14 21:29:03]

Done.

   ResourceTimingInfo* getNavigationTimingInfo();
 
   // This is only exposed for testing purposes.
@@ -230,12 +231,12 @@ class PLATFORM_EXPORT ResourceFetcher
   TaskRunnerTimer<ResourceFetcher> m_resourceTimingReportTimer;
 
   using ResourceTimingInfoMap =
-      HeapHashMap<Member<Resource>, std::unique_ptr<ResourceTimingInfo>>;
+      HeapHashMap<Member<Resource>, RefPtr<ResourceTimingInfo>>;
   ResourceTimingInfoMap m_resourceTimingInfoMap;
 
-  std::unique_ptr<ResourceTimingInfo> m_navigationTimingInfo;
+  RefPtr<ResourceTimingInfo> m_navigationTimingInfo;
 
-  Vector<std::unique_ptr<ResourceTimingInfo>> m_scheduledResourceTimingReports;
+  Vector<RefPtr<ResourceTimingInfo>> m_scheduledResourceTimingReports;
 
   HeapHashSet<Member<ResourceLoader>> m_loaders;
   HeapHashSet<Member<ResourceLoader>> m_nonBlockingLoaders;