Worker: Run http/tests/workers/ with off-the-main-thread top-level dedicated worker script fetch

Bug: 835717
Change-Id: Icde42b1dd837ca6110933b5cffc53864b7778a0d
Reviewed-on: https://chromium-review.googlesource.com/c/1364811Reviewed-by: Makoto Shimazu <shimazu@chromium.org>
Commit-Queue: Hiroki Nakagawa <nhiroki@chromium.org>
Cr-Commit-Position: refs/heads/master@{#614280}

third_party/blink/web_tests/TestExpectations

@@ -4135,6 +4135,10 @@ crbug.com/835717 virtual/omt-worker-fetch/fast/workers/chromium/worker-crash-wit
 # script loading changes the order of url revocation and script fetch.
 # See also crbug.com/800898.
 crbug.com/835717 virtual/omt-worker-fetch/external/wpt/workers/dedicated-worker-from-blob-url.window.html [ Timeout ]
+# These fail because of various reasons.
+crbug.com/835717 virtual/omt-worker-fetch/http/tests/workers/worker-invalid-context.html [ Failure ]
+crbug.com/835717 virtual/omt-worker-fetch/http/tests/workers/worker-performance-timeline.html [ Failure ]
+crbug.com/835717 virtual/omt-worker-fetch/http/tests/workers/worker-redirect.html [ Failure ]
 
 # This fails because AllowedByNoSniff::MimeTypeAsScript() blocks the nested worker's
 # worker script, because the script url has a .html file extension.

third_party/blink/web_tests/VirtualTestSuites

@@ -709,6 +709,11 @@
     "base": "fast/workers",
     "args": ["--enable-blink-features=OffMainThreadWorkerScriptFetch"]
   },
+  {
+    "prefix": "omt-worker-fetch",
+    "base": "http/tests/workers",
+    "args": ["--enable-blink-features=OffMainThreadWorkerScriptFetch"]
+  },
   {
     "prefix": "webrtc-wpt-unified-plan",
     "base": "external/wpt/webrtc",

third_party/blink/web_tests/virtual/omt-worker-fetch/http/tests/workers/README.txt

+This directory is for testing off-the-main-thread top-level worker classic
+script loading. See https://crbug.com/835717.