Re-enable RenderThreadImplBrowserTest.NonResourceDispatchIPCTasksDontGoThroughScheduler

Bug: 827318,876947
Change-Id: I72ead221b797a90c19d7742422d65a29ed5f1741
Reviewed-on: https://chromium-review.googlesource.com/c/1318849Reviewed-by: John Abd-El-Malek <jam@chromium.org>
Commit-Queue: Matt Mueller <mattm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605833}

testing/buildbot/filters/mojo.fyi.network_content_browsertests.filter

@@ -21,10 +21,6 @@
 -CrossSiteDocumentBlockingIsolatedOriginTest.BlockDocumentsFromIsolatedOrigin
 -CrossSiteDocumentBlockingServiceWorkerTest.NoNetwork
 
-# Flakes on Android.
-# https://crbug.com/827318
--RenderThreadImplBrowserTest.NonResourceDispatchIPCTasksDontGoThroughScheduler
-
 # NOTE: if adding an exclusion for an existing failure (e.g. additional test for
 # feature X that is already not working), please add it beside the existing
 # failures. Otherwise please reach out to network-service-dev@.