Enable ServiceWorkerNavigationPreload by default for Origin-Trial.

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 2250c47a860f1ad3e8b256132bc9e94c0f064693..f46dfb32d1f6efc82c14005a4891d73fc2abe7a7 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
@@ -10,18 +10,19 @@ Fetch event handler
 event.preloadResponse not found
 
 CONSOLE MESSAGE: line 76: --Origin-Trial enabled SW--
-disable() rejected with: AbortError: Failed to enable or disable navigation preload: The Navigation Preload Origin Trial has ended.
-enable() rejected with: AbortError: Failed to enable or disable navigation preload: The Navigation Preload Origin Trial has ended.
-getState() resolved with: {"enabled":false,"headerValue":"true"}
-setHeaderValue() rejected with: AbortError: Failed to set navigation preload header: The Navigation Preload Origin Trial has ended.
+disable() resolved with: undefined
+enable() resolved with: undefined
+getState() resolved with: {"enabled":true,"headerValue":"world"}
+setHeaderValue() resolved with: undefined
 log from SW
 Activate event handler
-disable() rejected with: AbortError: Failed to enable or disable navigation preload: The Navigation Preload Origin Trial has ended.
-enable() rejected with: AbortError: Failed to enable or disable navigation preload: The Navigation Preload Origin Trial has ended.
-getState() resolved with: {"enabled":false,"headerValue":"true"}
-setHeaderValue() rejected with: AbortError: Failed to set navigation preload header: The Navigation Preload Origin Trial has ended.
+disable() resolved with: undefined
+enable() resolved with: undefined
+getState() resolved with: {"enabled":true,"headerValue":"true"}
+setHeaderValue() resolved with: undefined
 Fetch event handler
-event.preloadResponse resolved with: undefined
+event.preloadResponse resolved with: [object Response]
+Text of preloadResponse: [Service-Worker-Navigation-Preload header set: hello]
 
 This is a testharness.js-based test.
 PASS Calling Navigation preload related methods for normal SW.