transferSize implementation

third_party/WebKit/Source/core/loader/DocumentLoader.cpp

Index: third_party/WebKit/Source/core/loader/DocumentLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/DocumentLoader.cpp b/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
index 49422fdcc3170c7a3bcdb084a2ae0cc6bed04de2..e0be86db22426962cd7603d7c4cf76090748b1d6 100644
--- a/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
@@ -60,6 +60,8 @@
 #include "core/loader/appcache/ApplicationCacheHost.h"
 #include "core/page/FrameTree.h"
 #include "core/page/Page.h"
+#include "core/timing/DOMWindowPerformance.h"
+#include "core/timing/Performance.h"
 #include "platform/HTTPNames.h"
 #include "platform/MIMETypeRegistry.h"
 #include "platform/UserGestureIndicator.h"
@@ -148,6 +150,10 @@ unsigned long DocumentLoader::mainResourceIdentifier() const {
   return m_mainResource ? m_mainResource->identifier() : 0;
 }
 
+ResourceTimingInfo* DocumentLoader::getMainResourceTimingInfo() const {
+  return fetcher()->getMainResourceTimingInfo(mainResourceIdentifier());
+}
+
 const ResourceRequest& DocumentLoader::originalRequest() const {
   return m_originalRequest;
 }
@@ -312,6 +318,11 @@ void DocumentLoader::finishedLoading(double finishTime) {
   if (!m_frame)
     return;
 
+  Performance* performance =
+      DOMWindowPerformance::performance(*m_frame->domWindow());
+  DCHECK(performance);
+  performance->addNavigationTiming(m_frame, getMainResourceTimingInfo());

[Yoav Weiss, 2016/11/18 10:06:30]

I may be wrong but I don't think this is guaranteed to run after the window's
load event ended.

[sunjian, 2016/11/18 20:23:29]

You are right about this. I made a mistake recognizing this method finishing
later cause the m_mainResource's identifier always being 0 when requested at nav
timing instance construction. I found out that they reset m_mainResource when
loading finished. Now i add a field to store the identifier to get around this.

+
   m_applicationCacheHost->finishedLoadingMainResource();
   endWriting();
   if (m_state < MainResourceDone)