transferSize implementation

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

Index: third_party/WebKit/Source/core/timing/PerformanceBase.cpp
diff --git a/third_party/WebKit/Source/core/timing/PerformanceBase.cpp b/third_party/WebKit/Source/core/timing/PerformanceBase.cpp
index 39a7e3029048b737b9dd46be61be55e16c9c23ef..567dc5f0f7e663df51efc624d9c2de05bd277054 100644
--- a/third_party/WebKit/Source/core/timing/PerformanceBase.cpp
+++ b/third_party/WebKit/Source/core/timing/PerformanceBase.cpp
@@ -336,12 +336,15 @@ void PerformanceBase::addNavigationTiming(LocalFrame* frame) {
   DCHECK(frame);
   const DocumentLoader* documentLoader = frame->loader().documentLoader();
   DCHECK(documentLoader);
+
   const DocumentLoadTiming& documentLoadTiming = documentLoader->timing();
 
   const DocumentTiming* documentTiming =
       frame->document() ? &(frame->document()->timing()) : nullptr;
 
   const ResourceResponse& finalResponse = documentLoader->response();
+  ResourceTimingInfo* resourceTimingInfo =
+      documentLoader->getMainResourceTimingInfo();
 
   ResourceLoadTiming* resourceLoadTiming = finalResponse.resourceLoadTiming();
   // Don't create a navigation timing instance when
@@ -352,8 +355,8 @@ void PerformanceBase::addNavigationTiming(LocalFrame* frame) {
   double lastRedirectEndTime = documentLoadTiming.redirectEnd();
   double finishTime = documentLoadTiming.loadEventEnd();
 
-  // TODO(sunjian) Implement transfer size. crbug/663187
-  unsigned long long transferSize = 0;
+  unsigned long long transferSize =
+      resourceTimingInfo ? resourceTimingInfo->transferSize() : 0;
   unsigned long long encodedBodyLength = finalResponse.encodedBodyLength();
   unsigned long long decodedBodyLength = finalResponse.decodedBodyLength();
   bool didReuseConnection = finalResponse.connectionReused();