service worker: Add console.warn output to enable -expected.txt files

third_party/WebKit/LayoutTests/http/tests/serviceworker/chromium/navigation-preload-origin-trial-methods-expected.txt

Index: third_party/WebKit/LayoutTests/http/tests/serviceworker/chromium/navigation-preload-origin-trial-methods-expected.txt
diff --git a/third_party/WebKit/LayoutTests/http/tests/serviceworker/chromium/navigation-preload-origin-trial-methods-expected.txt b/third_party/WebKit/LayoutTests/http/tests/serviceworker/chromium/navigation-preload-origin-trial-methods-expected.txt
index f46dfb32d1f6efc82c14005a4891d73fc2abe7a7..a3bdeb720ed5a7c778225a76c6318e9b713b031f 100644
--- a/third_party/WebKit/LayoutTests/http/tests/serviceworker/chromium/navigation-preload-origin-trial-methods-expected.txt
+++ b/third_party/WebKit/LayoutTests/http/tests/serviceworker/chromium/navigation-preload-origin-trial-methods-expected.txt
@@ -1,4 +1,5 @@
-CONSOLE MESSAGE: line 65: --normal SW--
+CONSOLE WARNING: line 13: This test relies on console message comparison so there can be different -expected.txt files for virtual test suites.
+CONSOLE MESSAGE: line 68: --normal SW--
 disable() rejected with: AbortError: Failed to enable or disable navigation preload: The service worker script does not have a valid Navigation Preload Origin Trial token.
 enable() rejected with: AbortError: Failed to enable or disable navigation preload: The service worker script does not have a valid Navigation Preload Origin Trial token.
 getState() resolved with: {"enabled":false,"headerValue":"true"}
@@ -9,7 +10,7 @@ registration.navigationPreload not found
 Fetch event handler
 event.preloadResponse not found
 
-CONSOLE MESSAGE: line 76: --Origin-Trial enabled SW--
+CONSOLE MESSAGE: line 79: --Origin-Trial enabled SW--
 disable() resolved with: undefined
 enable() resolved with: undefined
 getState() resolved with: {"enabled":true,"headerValue":"world"}