Revert "Fetch: Plumb request initiator through passthrough service wo…

…rkers."

This reverts commit da0a6501cf321579bd46a27ff9fba1bb8ea910bb.

Reason for revert: Failure on many bots with the following error message:
The service worker navigation preload request was cancelled before 'preloadResponse' settled. If you intend to use 'preloadResponse', use waitUntil() or respondWith() to wait for the promise to settle.", source:  (0)

Original change's description:
> Fetch: Plumb request initiator through passthrough service workers.
>
> This CL contains essentially two changes:
>
> 1. The request initiator origin is plumbed through service workers
>    that do `fetch(evt.request)`.  In addition to plumbing, this
>    requires changes to how we validate navigation requests in the
>    CorsURLLoaderFactory.
> 2. Tracks the original destination of a request passed through a
>    service worker.  This is then used in the network service to force
>    SameSite=Lax cookies to treat the request as a main frame navigation
>    where appropriate.
>
> For more detailed information about these changes please see the
> internal design doc at:
>
> https://docs.google.com/document/d/1KZscujuV7bCFEnzJW-0DaCPU-I40RJimQKoCcI0umTQ/edit?usp=sharing
>
> In addition, there is some discussion of these features in the following
> spec issues:
>
> whatwg/fetch#1321
> whatwg/fetch#1327
>
> The test includes WPT tests that verify navigation headers and SameSite
> cookies.  Note, chrome has a couple expected failures in the SameSite
> cookie tests because of the "lax-allowing-unsafe" intervention that is
> currently enabled.  See:
>
> https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/web_tests/TestExpectations;l=4635;drc=e8133cbf2469adb99c6610483ab78bcfb8cc4c76
>
> Bug: 1115847,1241188
> Change-Id: I7e236fa20aeabb705aef40fcf8d5c36da6d2798c
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3115917
> Reviewed-by: Matt Menke <mmenke@chromium.org>
> Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
> Reviewed-by: Nasko Oskov <nasko@chromium.org>
> Reviewed-by: Łukasz Anforowicz <lukasza@chromium.org>
> Commit-Queue: Ben Kelly <wanderview@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#936029}

Bug: 1115847,1241188
Change-Id: I3044a6d20de172b4a8ab7e39a9f26191580003fa
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3251692
Auto-Submit: Alan Screen <awscreen@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Alan Screen <awscreen@chromium.org>
Owners-Override: Alan Screen <awscreen@chromium.org>
Cr-Commit-Position: refs/heads/main@{#936125}

service-workers/service-worker/resources/fetch-rewrite-worker.js

@@ -90,12 +90,8 @@ self.addEventListener('fetch', function(event) {
         var request = event.request;
         if (url) {
           request = new Request(url, init);
-        } else if (params['change-request']) {
-          request = new Request(request, init);
         }
-        const response_promise = params['navpreload'] ? event.preloadResponse
-                                                      : fetch(request);
-        response_promise.then(function(response) {
+        fetch(request).then(function(response) {
           var expectedType = params['expected_type'];
           if (expectedType && response.type !== expectedType) {
             // Resolve a JSON object with a failure instead of rejecting