Handle row borders in border collapsing logic.
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Handle table row border when collapsing borders for a table row. The row border is combined with the cell's border using the already implemented conflict resolution logic.
This is a screenshot of the following test:
```html
<!doctype html>
<html><body>
<style>
table {
border-collapse: collapse;
}
tr {
border: 1px solid black;
}
</style>
<table>
<tr><td>Lorem</td><td>Ipsum</td><td>Sit</td><td>Dolor</td></tr>
<tr><td>Lorem</td><td>Ipsum</td><td>Sit</td><td>Dolor</td></tr>
<tr><td>Lorem</td><td>Ipsum</td><td>Sit</td><td>Dolor</td></tr>
<tr><td>Lorem</td><td>Ipsum</td><td>Sit</td><td>Dolor</td></tr>
</table>
</body>
</html>
```
<img src="https://dl.dropboxusercontent.com/u/10962672/Screenshots%20Servo/servo_tr_border_collapse.png"/>
The top border is missing, but I think that's a different bug, since it also does not show up when the border is in the cells, and not the rows. Also, when debugging the border collapsing structures, they seem ok (the top border seems to be there). I can look at that bug in a separate issue (or in this one too if you prefer).
---
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Fixes#11527.
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Console message packets should have a '_type' attribute
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Renamed the `type_` attribute of `PageError` and `ConsoleAPI` structs to make them correct Firefox RDP packets.
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Tidy: Handle empty files
Fix index error ``list index out of range``, when file is empty.
r? @Wafflespeanut
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layout: Keep track of whether we've deferred the painting of the document due to a script query.
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r? @pcwalton
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`Stylist` contains separate hashmaps for important and normal declarations,
but typically a given block only contains declarations of one importance.
Before this commit, there is an optimization where
a `PropertyDeclarationBlock` is only inserted in the corresponding map
if it has a non-zero number of declaration of a given importance.
With CSSOM, `PropertyDeclarationBlock` is gonna have interior mutability:
the importance (priority) of a declaration could change.
This optimization would become incorrect when the block is missing
in a hashmap where it should be.
This commits removes the original optimization, and replaces it with
a slightly weaker one: if a block doesn’t have any declaration
with the importance we’re cascading for, skip selector matching.
a script query.
This will, rather unfortunately, mean that we might repaint two times if we've
deferred a paint, then get an out-of-band reflow. Still seemed better than not
suppressing paints at all.
Fixes#13131
bump Tidy version
Published a new tidy after config file fixes landed, as requested in https://github.com/servo/servo/issues/10636#issuecomment-210658297. This commit makes the repo match what I published, is all.
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style: Allow calc in media queries.
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Fixes https://bugzilla.mozilla.org/show_bug.cgi?id=1290228
No tests have been added yet, I expect wpt to catch something, otherwise I'll write/import others.
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Html option element.form#13111
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Add HTMLOptionElement form attribute support
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Fix debug assertion introduced in #13108 by me.
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I'm stupid, and when I did the last moving-the-code-around, I failed miserably
to double-check it in a debug build.
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Fix canvas image tests when using webrender.
When webrender is enabled, image decoding doesn't pre-multiply by
alpha, but the canvas code expects the image data to be
pre-multiplied form.
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