moved to https://codereview.chromium.org/399543002/

Source/core/timing/Performance.cpp

Index: Source/core/timing/Performance.cpp
diff --git a/Source/core/timing/Performance.cpp b/Source/core/timing/Performance.cpp
index 6029829a1130437d17209a9b95938227867f6139..4778252340e2da7f69b7f151b5a33d07cc823bde 100644
--- a/Source/core/timing/Performance.cpp
+++ b/Source/core/timing/Performance.cpp
@@ -214,9 +214,11 @@ void Performance::addResourceTiming(const ResourceTimingInfo& info, Document* in
     const Vector<ResourceResponse>& redirectChain = info.redirectChain();
     bool allowRedirectDetails = allowsTimingRedirect(redirectChain, finalResponse, initiatorDocument);
 
-    if (!allowRedirectDetails) {
+    // ServiceWorker doesn't support TimingInfo.
+    // FIXME: Implement ServiceWorkerURLRequestJob::GetLoadTimingInfo().
+    if (!allowRedirectDetails && !finalResponse.wasFetchedViaServiceWorker()) {
         ResourceLoadTiming* finalTiming = finalResponse.resourceLoadTiming();
-        ASSERT(finalTiming);
+        ASSERT(finalTiming || finalResponse.wasFetchedViaServiceWorker());
         if (finalTiming)
             startTime = finalTiming->requestTime;
     }