Update filters for some ServiceWorker tests.

These tests were parameterized and the .* does not cross the /
boundary, so the filters didn't filter the tests.

TBR=yuzus@chromium.org

Bug: 1020884
Change-Id: I653b1ef797e0d77ae722080e2e0a33d6fbcfea3b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1898904Reviewed-by: Fergal Daly <fergal@chromium.org>
Commit-Queue: Fergal Daly <fergal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712469}

testing/buildbot/filters/bfcache.content_unittests.filter

@@ -17,10 +17,10 @@
 # https://crbug.com/1020884
 -ServiceWorkerProviderHostTest.*
 -ServiceWorkerNavigationLoaderTest.*
--ServiceWorkerRegistrationObjectHostUpdateTestP.*
+-ServiceWorkerRegistrationObjectHostUpdateTestP/ServiceWorkerRegistrationObjectHostUpdateTest.*
 -ServiceWorkerControlleeRequestHandlerTest.*
--ServiceWorkerActivationTestWithDevTools.*
--ServiceWorkerUpdateJobTestP.*
+-ServiceWorkerActivationTestWithDevTools/ServiceWorkerActivationTest.*
+-ServiceWorkerUpdateJobTestP/ServiceWorkerUpdateJobTest.*
 -ServiceWorkerRegistrationObjectHostTest.*
 -ServiceWorkerJobTest.*
 -ServiceWorkerVersionTest.*