Implement WebSocket#binaryType

[tomjakubowski]

Closes #7098

[highfive]

Thanks for the pull request, and welcome! The Servo team is excited to review your changes, and you should hear from @metajack (or someone else) soon.

[highfive]

Warning

• These commits modify unsafe code. Please review it carefully!

[Ms2ger]

Thank you for your PR!

-S-awaiting-review +S-needs-code-changes +S-needs-squash

---

Reviewed 1 of 2 files at r1, 3 of 3 files at r2, 1 of 1 files at r4.
Review status: all files reviewed at latest revision, 2 unresolved discussions, all commit checks successful.

---

^{components/script/dom/websocket.rs, line 52 [r4] (raw file):}
Nit: ptr comes before sync

---

^{components/script/dom/websocket.rs, line 441 [r4] (raw file):}
If data.len() is more than 2^32, this will overwrite unallocated memory. Please store data.len() as u32 in a local, and cast back to usize here.

---

Comments from the review on Reviewable.io

[tomjakubowski]

@Ms2ger addressed your comments and squashed

[Ms2ger]

Thank you!

@bors-servo r+

[bors-servo]

📌 Commit 1f1dbfa has been approved by Ms2ger

[bors-servo]

⌛ Testing commit 1f1dbfa with merge 311dea8...

[bors-servo]

💔 Test failed - linux2

[Ms2ger]

Looks like you missed one more:

/html/dom/interfaces.html
-------------------------
PASS expected FAIL WebSocket interface: attribute binaryType

[tomjakubowski]

Whoops. Re-pushed.

[jdm]

@bors-servo: r=Ms2ger

[bors-servo]

📌 Commit e92f462 has been approved by Ms2ger

[bors-servo]

⌛ Testing commit e92f462 with merge 7c63c7d...

[bors-servo]

☀️ Test successful - android, gonk, linux1, linux2, mac1, mac2, mac3