diff --git a/LayoutTests/http/tests/css/resource-timing-details-for-revalidation-expected.txt b/LayoutTests/http/tests/css/resource-timing-details-for-revalidation-expected.txt
new file mode 100644
index 0000000..ef43990
--- /dev/null
+++ b/LayoutTests/http/tests/css/resource-timing-details-for-revalidation-expected.txt
@@ -0,0 +1,6 @@
+PASS successfullyParsed is true
+
+TEST COMPLETE
+PASS entry.domainLookupStart > 0 is true
+This fetches ahem font.
+
diff --git a/LayoutTests/http/tests/css/resource-timing-details-for-revalidation.html b/LayoutTests/http/tests/css/resource-timing-details-for-revalidation.html
new file mode 100644
index 0000000..7951903
--- /dev/null
+++ b/LayoutTests/http/tests/css/resource-timing-details-for-revalidation.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<script src="/js-test-resources/js-test.js"></script>
+<style>
+@font-face {
+    font-family: ahem;
+    src: url(http://localhost:8080/css/resources/cors-ahem.php);
+}
+</style>
+
+<div style="font-family: ahem;">This fetches ahem font.<div>
+
+<script>
+if (window.testRunner)
+    testRunner.waitUntilDone();
+
+var entry;
+if (location.hash == '#check') {
+    document.fonts.ready().then(function() {
+        entry = performance.getEntriesByName('http://localhost:8080/css/resources/cors-ahem.php')[0];
+        shouldBeTrue('entry.domainLookupStart > 0');
+        if (window.testRunner)
+            testRunner.notifyDone();
+    });
+} else {
+    document.fonts.ready().then(function() {
+        location.hash = 'check';
+        location.reload();
+    });
+}
+</script>
diff --git a/LayoutTests/http/tests/css/resources/cors-ahem.php b/LayoutTests/http/tests/css/resources/cors-ahem.php
new file mode 100644
index 0000000..a18850e
--- /dev/null
+++ b/LayoutTests/http/tests/css/resources/cors-ahem.php
@@ -0,0 +1,19 @@
+<?php
+
+if (isset($_SERVER["HTTP_IF_MODIFIED_SINCE"])) {
+    header("HTTP/1.1 304 Not Modified");
+} else {
+    $font = "../../../../resources/Ahem.ttf";
+
+    header("Cache-Control: public, max-age=86400");
+    header('Last-Modified: ' . gmdate("D, d M Y H:i:s", filemtime($font)) . " GMT");
+    header("Content-Type: font/truetype");
+    header("Content-Length: " . filesize($font));
+    header("Access-Control-Allow-Origin: *");
+    header("Timing-Allow-Origin: *");
+    ob_clean();
+    flush();
+    readfile($font);
+}
+
+?>
diff --git a/Source/core/fetch/ResourceFetcher.cpp b/Source/core/fetch/ResourceFetcher.cpp
index 9848632..f2a2eb2 100644
--- a/Source/core/fetch/ResourceFetcher.cpp
+++ b/Source/core/fetch/ResourceFetcher.cpp
@@ -872,6 +872,12 @@
 
     RefPtr<ResourceTimingInfo> info = ResourceTimingInfo::create(resource->options().initiatorInfo.name, monotonicallyIncreasingTime());
 
+    if (resource->isCacheValidator()) {
+        const AtomicString& timingAllowOrigin = resource->resourceToRevalidate()->response().httpHeaderField("Timing-Allow-Origin");
+        if (!timingAllowOrigin.isEmpty())
+            info->setOriginalTimingAllowOrigin(timingAllowOrigin);
+    }
+
     if (resource->type() == Resource::MainResource) {
         // <iframe>s should report the initial navigation requested by the parent document, but not subsequent navigations.
         if (frame()->ownerElement() && !frame()->ownerElement()->loadedNonEmptyDocument()) {
diff --git a/Source/core/timing/Performance.cpp b/Source/core/timing/Performance.cpp
index e2e0928..66601ed 100644
--- a/Source/core/timing/Performance.cpp
+++ b/Source/core/timing/Performance.cpp
@@ -157,7 +157,7 @@
         dispatchEvent(Event::create(EventTypeNames::webkitresourcetimingbufferfull));
 }
 
-static bool passesTimingAllowCheck(const ResourceResponse& response, Document* requestingDocument)
+static bool passesTimingAllowCheck(const ResourceResponse& response, Document* requestingDocument, const AtomicString& originalTimingAllowOrigin)
 {
     AtomicallyInitializedStatic(AtomicString&, timingAllowOrigin = *new AtomicString("timing-allow-origin"));
 
@@ -165,7 +165,7 @@
     if (resourceOrigin->isSameSchemeHostPort(requestingDocument->securityOrigin()))
         return true;
 
-    const AtomicString& timingAllowOriginString = response.httpHeaderField(timingAllowOrigin);
+    const AtomicString& timingAllowOriginString = originalTimingAllowOrigin.isEmpty() ? response.httpHeaderField(timingAllowOrigin) : originalTimingAllowOrigin;
     if (timingAllowOriginString.isEmpty() || equalIgnoringCase(timingAllowOriginString, "null"))
         return false;
 
@@ -185,11 +185,11 @@
 
 static bool allowsTimingRedirect(const Vector<ResourceResponse>& redirectChain, const ResourceResponse& finalResponse, Document* initiatorDocument)
 {
-    if (!passesTimingAllowCheck(finalResponse, initiatorDocument))
+    if (!passesTimingAllowCheck(finalResponse, initiatorDocument, emptyAtom))
         return false;
 
     for (size_t i = 0; i < redirectChain.size(); i++) {
-        if (!passesTimingAllowCheck(redirectChain[i], initiatorDocument))
+        if (!passesTimingAllowCheck(redirectChain[i], initiatorDocument, emptyAtom))
             return false;
     }
 
@@ -202,7 +202,7 @@
         return;
 
     const ResourceResponse& finalResponse = info.finalResponse();
-    bool allowTimingDetails = passesTimingAllowCheck(finalResponse, initiatorDocument);
+    bool allowTimingDetails = passesTimingAllowCheck(finalResponse, initiatorDocument, info.originalTimingAllowOrigin());
     double startTime = info.initialTime();
 
     if (info.redirectChain().isEmpty()) {
diff --git a/Source/core/timing/ResourceTimingInfo.h b/Source/core/timing/ResourceTimingInfo.h
index ef3f42d..ff8094e 100644
--- a/Source/core/timing/ResourceTimingInfo.h
+++ b/Source/core/timing/ResourceTimingInfo.h
@@ -49,6 +49,9 @@
     void setInitiatorType(const AtomicString& type) { m_type = type; }
     const AtomicString& initiatorType() const { return m_type; }
 
+    void setOriginalTimingAllowOrigin(const AtomicString& originalTimingAllowOrigin) { m_originalTimingAllowOrigin = originalTimingAllowOrigin; }
+    const AtomicString& originalTimingAllowOrigin() const { return m_originalTimingAllowOrigin; }
+
     void setLoadFinishTime(double time) { m_loadFinishTime = time; }
     double loadFinishTime() const { return m_loadFinishTime; }
 
@@ -76,6 +79,7 @@
     }
 
     AtomicString m_type;
+    AtomicString m_originalTimingAllowOrigin;
     double m_initialTime;
     double m_loadFinishTime;
     ResourceRequest m_initialRequest;