Upgrade TransferableStreams feature to experimental

Set the status of the "TransferableStreams" feature to "experimental". This
means that it is enabled by default for layout tests, and behind the
"experimental web platform features" in the browser.

Remove the virtual test suite for the feature.

BUG=894838

Change-Id: I0b1efdbbcaf08448e7578eea2ef859cea1930cbc
Reviewed-on: https://chromium-review.googlesource.com/c/1355299
Commit-Queue: Adam Rice <ricea@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#613037}

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -1263,6 +1263,7 @@
     },
     {
       name: "TransferableStreams",
+      status: "experimental",
     },
     // This is conditionally set if the platform supports translation.
     {

third_party/blink/web_tests/VirtualTestSuites

@@ -1017,11 +1017,6 @@
     "base": "http/tests/webaudio/autoplay-crossorigin.html",
     "args": ["--disable-site-isolation-trials"]
   },
-  {
-    "prefix": "transferable-streams",
-    "base": "http/tests/streams/transferable",
-    "args": ["--enable-blink-features=TransferableStreams"]
-  },
   {
     "prefix": "streaming-preload",
     "base": "http/tests/fetch",

third_party/blink/web_tests/http/tests/streams/transferable/service-worker-expected.txt

-This is a testharness.js-based test.
-PASS service-worker
-FAIL serviceWorker.controller.postMessage should be able to transfer a ReadableStream Failed to execute 'postMessage' on 'ServiceWorker': Value at index 0 does not have a transferable type.
-FAIL postMessage in a service worker should be able to transfer ReadableStream promise_test: Unhandled rejection with value: "Failed to execute 'postMessage' on 'Client': Value at index 0 does not have a transferable type."
-Harness: the test ran to completion.
-

third_party/blink/web_tests/http/tests/streams/transferable/shared-worker-expected.txt

-This is a testharness.js-based test.
-FAIL worker.postMessage should be able to transfer a ReadableStream Failed to execute 'postMessage' on 'MessagePort': Value at index 0 does not have a transferable type.
-FAIL postMessage in a worker should be able to transfer a ReadableStream promise_test: Unhandled rejection with value: "Failed to execute 'postMessage' on 'MessagePort': Value at index 0 does not have a transferable type."
-Harness: the test ran to completion.
-

third_party/blink/web_tests/http/tests/streams/transferable/transform-stream-expected.txt

-This is a testharness.js-based test.
-FAIL window.postMessage should be able to transfer a TransformStream Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type.
-FAIL a TransformStream with a locked writable should not be transferable assert_throws: postMessage should throw function "() => postMessage(ts, '*', [ts])" threw object "TypeError: Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type." that is not a DOMException DataCloneError: property "code" is equal to undefined, expected 25
-FAIL a TransformStream with a locked readable should not be transferable assert_throws: postMessage should throw function "() => postMessage(ts, '*', [ts])" threw object "TypeError: Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type." that is not a DOMException DataCloneError: property "code" is equal to undefined, expected 25
-FAIL a TransformStream with both sides locked should not be transferable assert_throws: postMessage should throw function "() => postMessage(ts, '*', [ts])" threw object "TypeError: Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type." that is not a DOMException DataCloneError: property "code" is equal to undefined, expected 25
-FAIL piping through transferred transforms should work Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type.
-Harness: the test ran to completion.
-

third_party/blink/web_tests/http/tests/streams/transferable/window-expected.txt

-CONSOLE ERROR: line 43: Uncaught (in promise) Error: assert_array_equals: there should be no ports in the event lengths differ, expected 0 got 1
-CONSOLE ERROR: line 43: Uncaught (in promise) Error: assert_array_equals: there should be no ports in the event lengths differ, expected 0 got 1
-This is a testharness.js-based test.
-Harness Error. harness_status.status = 1 , harness_status.message = assert_array_equals: there should be no ports in the event lengths differ, expected 0 got 1
-FAIL window.postMessage should be able to transfer a ReadableStream Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type.
-FAIL port.postMessage should be able to transfer a ReadableStream Failed to execute 'postMessage' on 'MessagePort': Value at index 0 does not have a transferable type.
-FAIL the same ReadableStream posted multiple times should arrive together Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type.
-FAIL transfer to and from an iframe should work promise_test: Unhandled rejection with value: object "TypeError: Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type."
-Harness: the test ran to completion.
-

third_party/blink/web_tests/http/tests/streams/transferable/worker-expected.txt

-CONSOLE ERROR: line 5: Uncaught TypeError: Failed to execute 'postMessage' on 'DedicatedWorkerGlobalScope': Value at index 0 does not have a transferable type.
-This is a testharness.js-based test.
-FAIL worker.postMessage should be able to transfer a ReadableStream Failed to execute 'postMessage' on 'Worker': Value at index 0 does not have a transferable type.
-FAIL postMessage in a worker should be able to transfer a ReadableStream promise_test: Unhandled rejection with value: "error in worker"
-Harness: the test ran to completion.
-

third_party/blink/web_tests/http/tests/streams/transferable/writable-stream-expected.txt

-This is a testharness.js-based test.
-FAIL window.postMessage should be able to transfer a WritableStream Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type.
-FAIL a locked WritableStream should not be transferable assert_throws: postMessage should throw function "() => postMessage(ws, '*', [ws])" threw object "TypeError: Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type." that is not a DOMException DataCloneError: property "code" is equal to undefined, expected 25
-FAIL window.postMessage should be able to transfer a {readable, writable} pair Failed to execute 'postMessage' on 'Window': Value at index 0 does not have a transferable type.
-Harness: the test ran to completion.
-

third_party/blink/web_tests/virtual/transferable-streams/http/tests/streams/transferable/README.txt

-Run the transferable streams tests with the feature enabled.

third_party/blink/web_tests/virtual/transferable-streams/http/tests/streams/transferable/service-worker-expected.txt

-This is a testharness.js-based test.
-PASS service-worker
-PASS serviceWorker.controller.postMessage should be able to transfer a ReadableStream
-PASS postMessage in a service worker should be able to transfer ReadableStream
-Harness: the test ran to completion.
-

third_party/blink/web_tests/virtual/transferable-streams/http/tests/streams/transferable/shared-worker-expected.txt

-This is a testharness.js-based test.
-PASS worker.postMessage should be able to transfer a ReadableStream
-PASS postMessage in a worker should be able to transfer a ReadableStream
-Harness: the test ran to completion.
-

third_party/blink/web_tests/virtual/transferable-streams/http/tests/streams/transferable/transform-stream-expected.txt

-This is a testharness.js-based test.
-PASS window.postMessage should be able to transfer a TransformStream
-PASS a TransformStream with a locked writable should not be transferable
-PASS a TransformStream with a locked readable should not be transferable
-PASS a TransformStream with both sides locked should not be transferable
-PASS piping through transferred transforms should work
-Harness: the test ran to completion.
-

third_party/blink/web_tests/virtual/transferable-streams/http/tests/streams/transferable/window-expected.txt

-This is a testharness.js-based test.
-PASS window.postMessage should be able to transfer a ReadableStream
-PASS port.postMessage should be able to transfer a ReadableStream
-PASS the same ReadableStream posted multiple times should arrive together
-PASS transfer to and from an iframe should work
-Harness: the test ran to completion.
-

third_party/blink/web_tests/virtual/transferable-streams/http/tests/streams/transferable/worker-expected.txt

-This is a testharness.js-based test.
-PASS worker.postMessage should be able to transfer a ReadableStream
-PASS postMessage in a worker should be able to transfer a ReadableStream
-Harness: the test ran to completion.
-

third_party/blink/web_tests/virtual/transferable-streams/http/tests/streams/transferable/writable-stream-expected.txt

-This is a testharness.js-based test.
-PASS window.postMessage should be able to transfer a WritableStream
-PASS a locked WritableStream should not be transferable
-PASS window.postMessage should be able to transfer a {readable, writable} pair
-Harness: the test ran to completion.
-