Enable ServiceWorkerImportedScriptUpdateCheck by default

Bug: 648295
Change-Id: I231e1ef402ac452a628330a883de73ecae75be99
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1706148
Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Kentaro Hara <haraken@chromium.org>
Auto-Submit: Makoto Shimazu <shimazu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#687982}
diff --git a/third_party/blink/common/features.cc b/third_party/blink/common/features.cc
index 5ca48b6..13dcb6ee 100644
--- a/third_party/blink/common/features.cc
+++ b/third_party/blink/common/features.cc
@@ -171,8 +171,7 @@
     "ServiceWorkerIsolateInForeground", base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kServiceWorkerImportedScriptUpdateCheck{
-    "ServiceWorkerImportedScriptUpdateCheck",
-    base::FEATURE_DISABLED_BY_DEFAULT};
+    "ServiceWorkerImportedScriptUpdateCheck", base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kServiceWorkerAggressiveCodeCache{
     "ServiceWorkerAggressiveCodeCache", base::FEATURE_DISABLED_BY_DEFAULT};
diff --git a/third_party/blink/web_tests/external/wpt/service-workers/service-worker/update-import-scripts.https-expected.txt b/third_party/blink/web_tests/external/wpt/service-workers/service-worker/update-import-scripts.https-expected.txt
deleted file mode 100644
index b475dd4..0000000
--- a/third_party/blink/web_tests/external/wpt/service-workers/service-worker/update-import-scripts.https-expected.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-This is a testharness.js-based test.
-PASS update() should fail when a new worker imports an unavailable script.
-PASS update() should succeed when the old imported script no longer exist but the new worker doesn't import it.
-PASS update() should treat 404 on imported scripts as no change.
-FAIL update() should find an update in an imported script but update() should result in failure due to missing the other imported script. assert_unreached: Should have rejected: undefined Reached unreachable code
-Harness: the test ran to completion.
-