Enable virtual tests in Network Service LayoutTests

These tests were blanket disabled when the number of failing LayoutTests
with the Network Service enabled was very high. Now that the number of
failures is more under control we should enable them.

The mojo-loading virtual tests are explicitly skipped since enabling the
Network Service also enables Mojo Loading and so the test coverage is
redundant.

TBR=jam@chromium.org
NOTRY=true

Bug: 729849
Change-Id: I33abad9d8a7cfe6cf498985d786dcc4294ae5229
Reviewed-on: https://chromium-review.googlesource.com/724081Reviewed-by: Reilly Grant <reillyg@chromium.org>
Commit-Queue: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#509586}

third_party/WebKit/LayoutTests/FlagExpectations/enable-features=NetworkService

 # These tests currently fail when run with --enable-network-service
 # See https://crbug.com/729849
 
+# Skip the mojo-loading virtual tests because the Mojo Loading flag is implied
+# by the Network Service flag. Failures there are duplicates of failures below.
+Bug(none) virtual/mojo-loading [ Skip ]
+
 Bug(none) compositing/video-frame-size-change.html [ Timeout ]
 Bug(none) external/wpt/clear-site-data/storage.https.html [ Failure ]
 Bug(none) external/wpt/fetch/api/abort/general-serviceworker.https.html [ Failure ]
@@ -355,6 +359,7 @@ Bug(none) http/tests/security/secureContexts/unauthenticated_worker.html [ Timeo
 Bug(none) http/tests/security/suborigins/suborigin-service-worker-fetch-event.html [ Crash Failure Timeout ]
 Bug(none) http/tests/security/suborigins/suborigin-unsafe-cookies.php [ Timeout ]
 Bug(none) http/tests/sendbeacon/beacon-same-origin.html [ Failure ]
+Bug(none) virtual/stable/http/tests/sendbeacon/beacon-same-origin.html [ Failure ]
 Bug(none) http/tests/serviceworker [ Crash Failure Timeout ]
 Bug(none) http/tests/websocket/cookie-document-to-ws.html [ Failure ]
 Bug(none) http/tests/websocket/cookie-http-to-ws.pl [ Failure ]
@@ -372,15 +377,11 @@ Bug(none) http/tests/xmlhttprequest/workers/cross-origin-unsupported-url.html [
 Bug(none) http/tests/xmlhttprequest/workers/shared-worker-response-type-blob-sync.html [ Timeout ]
 Bug(none) http/tests/xmlhttprequest/workers/shared-worker-response-type-blob.html [ Timeout ]
 Bug(none) http/tests/devtools/sources/debugger-breakpoints/event-listener-breakpoints-xhr.js [ Timeout ]
-Bug(none) virtual/mojo-loading/http/tests/devtools/sources/debugger-breakpoints/event-listener-breakpoints-xhr.js [ Timeout ]
-Bug(none) virtual/mojo-loading/http/tests/xmlhttprequest/methods-lower-case.html [ Failure Timeout Pass Crash ]
 Bug(none) installedapp/getinstalledrelatedapps-empty.html [ Timeout ]
 Bug(none) installedapp/getinstalledrelatedapps.html [ Timeout ]
 Bug(none) paint/invalidation/video-paint-invalidation.html [ Failure ]
 Bug(none) plugins/iframe-plugin-bgcolor.html [ Timeout ]
 
-Bug(none) virtual [ Crash Failure Timeout ]
-
 # Blob support for request bodies.
 crbug.com/761117 external/wpt/XMLHttpRequest/formdata-blob.htm [ Failure ]
 crbug.com/761117 external/wpt/XMLHttpRequest/formdata.htm [ Failure ]