[ServiceWorker] Block all mixed-content requests from a ServiceWorker.

LayoutTests/http/tests/serviceworker/fetch-mixed-content-to-inscope-expected.txt

Index: LayoutTests/http/tests/serviceworker/fetch-mixed-content-to-inscope-expected.txt
diff --git a/LayoutTests/http/tests/serviceworker/fetch-mixed-content-to-inscope-expected.txt b/LayoutTests/http/tests/serviceworker/fetch-mixed-content-to-inscope-expected.txt
deleted file mode 100644
index efbb01c92925ee357cb1d417680099258061a175..0000000000000000000000000000000000000000
--- a/LayoutTests/http/tests/serviceworker/fetch-mixed-content-to-inscope-expected.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-CONSOLE ERROR: Mixed Content: The page at 'https://127.0.0.1:8443/serviceworker/resources/fetch-mixed-content-iframe-inscope-to-inscope.html' was loaded over HTTPS, but requested an insecure image 'http://127.0.0.1:8000/serviceworker/resources/fetch-access-control.php?PNGIMAGE'. This request has been blocked; the content must be served over HTTPS.
-CONSOLE ERROR: Mixed Content: The page at 'https://127.0.0.1:8443/serviceworker/resources/fetch-mixed-content-iframe-inscope-to-inscope.html' was loaded over HTTPS, but requested an insecure image 'http://localhost:8000/serviceworker/resources/fetch-access-control.php?PNGIMAGE'. This request has been blocked; the content must be served over HTTPS.
-
-This is a testharness.js-based test.
-PASS Verify Mixed content of fetch() in a Service Worker 
-Harness: the test ran to completion.
-