Navigation Timing Level 2

third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp

Index: third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
diff --git a/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp b/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
index cf5a2af03e45f5ac061d31eddef52b62d989e000..a46bc007e63063d2cc8edc5cab96047865998c10 100644
--- a/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
+++ b/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
@@ -76,6 +76,8 @@
 #include "core/page/Page.h"
 #include "core/page/WindowFeatures.h"
 #include "core/page/scrolling/ScrollingCoordinator.h"
+#include "core/timing/DOMWindowPerformance.h"
+#include "core/timing/Performance.h"
 #include "platform/EventDispatchForbiddenScope.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "platform/weborigin/Suborigin.h"
@@ -1402,6 +1404,10 @@ void LocalDOMWindow::dispatchLoadEvent() {
     dispatchEvent(loadEvent, document());
   }
 
+  Performance* performance = DOMWindowPerformance::performance(*this);
+  DCHECK(performance);

[kinuko, 2016/11/06 15:16:43]

nit: this DCHECK is redundant; if it's null we crash at the next line and it'll
give us necessary information to debug

[sunjian, 2016/11/08 02:10:18]

I guess it's for documentation?

+  performance->addNavigationTiming(frame());
+
   // For load events, send a separate load event to the enclosing frame only.
   // This is a DOM extension and is independent of bubbling/capturing rules of
   // the DOM.