network.https.window.html?11-15 failed due to harness error

Error message: Tried to run in a non-testharness window
without a call to set_test_context

setCookie uses a test driver call to delete the cookies. Set
test context fixed the issue.

Bug: 338066470
Change-Id: I334c3f422127b689434c117a8f949d3b80b6a402
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5895659
Reviewed-by: Russ Hamilton <[email protected]>
Commit-Queue: Weizhong Xia <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1361833}

fledge/tentative/network.https.window.js

@@ -212,7 +212,7 @@ subsetTest(promise_test, async test => {
 subsetTest(promise_test, async test => {
  const uuid = generateUuid(test);
  let cookieFrame = await createFrame(test, OTHER_ORIGIN1);
- await runInFrame(test, cookieFrame, `await setCookie(test_instance)`);
+ await runInFrame(test, cookieFrame, `test_driver.set_test_context(window.parent); await setCookie(test_instance)`);
 
  await joinGroupAndRunBasicFledgeTestExpectingWinner(
  test,
@@ -315,7 +315,7 @@ subsetTest(promise_test, async test => {
 subsetTest(promise_test, async test => {
  const uuid = generateUuid(test);
  let cookieFrame = await createFrame(test, OTHER_ORIGIN1);
- await runInFrame(test, cookieFrame, `await setCookie(test_instance)`);
+ await runInFrame(test, cookieFrame, `test_driver.set_test_context(window.parent); await setCookie(test_instance)`);
 
  let renderURL = createRenderURL(uuid, /*script=*/null, /*signalsParam=*/'headers,cors');