Streams: Implement stream pipe-to (#35650)

* implement PipeTo, stub pipe_to

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* define a data structure to manage the piping

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* implement propagation of errors forward and backward, stub shutdown and shutdown with action

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* adding more fine-grain shutdown variants to state

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* implement progagate closing backward and forward

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* implement shutdown and actions

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* implement reading and writing

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* implement shutdown continuation and finalize

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* fix typo

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* add can_gc arguments

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* implement writer close with error propagation

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* move and document wait on pending write

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* more docs

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* write pending reads as part of shutdown

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* turn on piping test suite

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* add comment about using Rust api
improve comment on result
add comment on backpressure

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* fix multiple propagations

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* fix writing of chunks

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* fix error and close propagation
update test expectations

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* fix warnings

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* improve docs
remove redundant logic in pending writes

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* fix clippy

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* remove unnecessary expansion of visibility of enqueued value to_jsval

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* remove unnecessary conditional accessing of streams when propagating states

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* improve docs

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* remove unused result var

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* fix typo

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* remove redundant logic dealing with closed sources with pending writes

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* add doc links for shutdown actions

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* add comments on the need to return early when shutting down before checking close and error states

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* fmt

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>

* Update test expectations

Signed-off-by: Taym Haddadi <haddadi.taym@gmail.com>

* fix can_gc

Signed-off-by: Taym Haddadi <haddadi.taym@gmail.com>

---------

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>
Signed-off-by: Taym Haddadi <haddadi.taym@gmail.com>
Co-authored-by: Taym Haddadi <haddadi.taym@gmail.com>

tests/wpt/meta/fetch/api/response/response-body-read-task-handling.html.ini

@@ -1,3 +0,0 @@
-[response-body-read-task-handling.html]
-  [piping from a body stream to a JS-written WritableStream should occur in a microtask scope]
-    expected: FAIL

tests/wpt/meta/fetch/api/response/response-stream-disturbed-by-pipe.any.js.ini

@@ -2,17 +2,11 @@
   [using pipeThrough on Response body should disturb it synchronously]
     expected: FAIL
 
-  [using pipeTo on Response body should disturb it synchronously]
-    expected: FAIL
-
 
 [response-stream-disturbed-by-pipe.any.html]
   [using pipeThrough on Response body should disturb it synchronously]
     expected: FAIL
 
-  [using pipeTo on Response body should disturb it synchronously]
-    expected: FAIL
-
 
 [response-stream-disturbed-by-pipe.any.serviceworker.html]
   expected: ERROR

tests/wpt/meta/fetch/api/response/response-stream-with-broken-then.any.js.ini

@@ -1,5 +1,4 @@
 [response-stream-with-broken-then.any.worker.html]
-  expected: TIMEOUT
   [Attempt to inject {done: false, value: bye} via Object.prototype.then.]
     expected: FAIL
 
@@ -23,7 +22,6 @@
   expected: ERROR
 
 [response-stream-with-broken-then.any.html]
-  expected: CRASH
   [Attempt to inject {done: false, value: bye} via Object.prototype.then.]
     expected: FAIL