[ServiceWorker] Fix: Ensure timingInfo is returned on network fallback if SW static routing API is used w3c/ServiceWorker@ef029c5

Author: triple-underscore

service-workers-ja.html

@@ -255,7 +255,7 @@
 ●●options
 
 spec_date:2025-05-30
-trans_update:2025-05-30
+trans_update:2025-05-31
 source_checked:250530
 original_url:https://w3c.github.io/ServiceWorker/
 	abbr_url:SW1
@@ -15745,17 +15745,43 @@ <h3 title="Handle Fetch">`~fetchを取扱う@</h3>
 Let fetchResult be the result of Create Fetch Event and Dispatch with request, registration, useHighResPerformanceTimers, timingInfo, workerRealm, reservedClient, preloadResponse, and null.
 </li>
 	<li>
+<p>
+~IF［
+%計時~報 の`~worker最終-~router~source$swT ~NEQ 空~文字列
+］：
+◎
+If timingInfo’s worker final router source is not an empty string:
+</p>
+		<ol>
+			<li>
+~Assert：
+%計時~報 の`~worker最終-~router~source$swT ~EQ `network$l
+◎
+Assert timingInfo’s worker final router source is "network".
+</li>
+			<li>
 ~IF［
 %~fetch結果 ~NEQ ~NULL
-］~AND［
-%~fetch結果 の`~sw計時~報$rsの`~worker最終-~router~source$swT ~EQ `network$l
 ］
 ⇒
+~RET %計時~報
+◎
+If fetchResult is null, then return timingInfo.
+</li>
+			<li>
+~Assert：
+%~fetch結果 の`~sw計時~報$rsの`~worker最終-~router~source$swT ~EQ `network$l
+◎
+Else:
+• Assert fetchResult’s service worker timing info’s worker final router source is "network".
+</li>
+			<li>
 %~fetch結果 の`~sw計時~報$rsの`~worker最終-~router~source$swT ~SET `fetch-event$l
 ◎
-If fetchResult is not null and fetchResult’s service worker timing info’s worker final router source is set to "network":
 • Set fetchResult’s service worker timing info’s worker final router source to "fetch-event".
 </li>
+		</ol>
+	</li>
 	<li>
 ~RET %~fetch結果
 ◎