Implement Msg::Status with serialized url upon mouseover

[brunoabinader]

Credits for Mike Blumenkrantz (@zmike), I just rebased against trunk and
fixed the url serialization.

Fixes #6178.

[zmike]

Hooray!

[larsbergstrom]

Review status: 9 of 10 files reviewed, all discussions resolved, all commit checks successful.
Reviewed files:

• components/compositing/compositor.rs @ r1
• components/compositing/compositor_task.rs @ r1
• components/compositing/constellation.rs @ r1
• components/compositing/headless.rs @ r1
• components/compositing/windowing.rs @ r1
• components/msg/constellation_msg.rs @ r1
• ports/cef/window.rs @ r1
• ports/glutin/window.rs @ r1
• ports/gonk/src/window.rs @ r1

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Comments from the review on Reviewable.io

[jdm]

Review status: all files reviewed, 6 unresolved discussions, all commit checks successful.
Reviewed files:

• components/script/dom/document.rs @ r1

---

^{components/script/dom/document.rs, line 655 [r1] (raw file):}
Let's add a let target = target.root(); and clean up these two lines.

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^{components/script/dom/document.rs, line 660 [r1] (raw file):}
Let's add a loop to the MouseMoveEvent handler in script_task.rs instead of doing this work here.

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^{components/script/dom/document.rs, line 698 [r1] (raw file):}
Let's move this whole loop to the MouseMoveEvent handler in script_task.rs instead of adding it here.

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^{components/script/dom/document.rs, line 703 [r1] (raw file):}
ElementCast::to_ref(anchor.r()).unwrap();

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^{components/script/dom/document.rs, line 712 [r1] (raw file):}
We don't need any of this.

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^{components/script/dom/document.rs, line 721 [r1] (raw file):}
let status = attr.map(|href| { instead of the match.

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Comments from the review on Reviewable.io

[bors-servo]

☔ The latest upstream changes (presumably #6175) made this pull request unmergeable. Please resolve the merge conflicts.

[bors-servo]

☔ The latest upstream changes (presumably #6267) made this pull request unmergeable. Please resolve the merge conflicts.

[metajack]

@larsbergstrom re-r?

[larsbergstrom]

Reviewed 1 of 11 files at r2.
Review status: 1 of 10 files reviewed at latest revision, 1 unresolved discussion, some commit checks failed.

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^{components/script/script_task.rs, line 1426 [r2] (raw file):}
tiny nit: Please remove the one extra newline.

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Comments from the review on Reviewable.io

[larsbergstrom]

Reviewed 8 of 11 files at r2.
Review status: 9 of 10 files reviewed at latest revision, 1 unresolved discussion, some commit checks failed.

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Comments from the review on Reviewable.io

[larsbergstrom]

Reviewed 1 of 11 files at r2.
Review status: all files reviewed at latest revision, 1 unresolved discussion, some commit checks failed.

---

Comments from the review on Reviewable.io

[larsbergstrom]

@metajack GH still thinks it needs a rebase? Plus the one nit :-)

[metajack]

@brunoabinader ping

[brunoabinader]

@metajack pong! I've rebased against master and fixed the nit 👍

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Review status: 0 of 10 files reviewed at latest revision, all discussions resolved, all commit checks successful.

---

Comments from the review on Reviewable.io

[larsbergstrom]

@bors-servo: r+

[bors-servo]

📌 Commit 54494cd has been approved by larsbergstrom

[brunoabinader]

Please do not merge yet, I found an issue in script_task related to misusage of root(). Fixing it now.

[larsbergstrom]

@bors-servo: r-

[Ms2ger]

@bors-servo r=larsbergstrom

[bors-servo]

📌 Commit a08bd8b has been approved by larsbergstrom

[bors-servo]

⌛ Testing commit a08bd8b with merge 120fc18...

[bors-servo]

💔 Test failed - linux1

[brunoabinader]

💔 Test failed - linux1

Oops, that one didn't fired up on my OSX build. I've added a stub for glutin.

[brunoabinader]

@bors-servo r=larsbergstrom

[bors-servo]

📌 Commit b3927d5 has been approved by larsbergstrom

[bors-servo]

⌛ Testing commit b3927d5 with merge 82e476f...

[bors-servo]

💔 Test failed - linux3

[jdm]

@bors-servo: retry

• #6818

[bors-servo]

⚡ Previous build results for android, gonk, linux2, mac1, mac2, mac3 are reusable. Rebuilding only linux1, linux3...

[bors-servo]

☀️ Test successful - android, gonk, linux1, linux2, linux3, mac1, mac2, mac3