Upgrade to rustc 1.16.0-nightly (6f1ae663e 2017-01-06)
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Remove the unused dependency of style to plugins.
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It turns out that it's problematic to embed ThreadLocalStyleContext within
LayoutContext, because parameterizing the former on TElement (which we do
in the next patch) infects all the traversal stuff with the trait parameters,
which we don't really want.
In general, it probably makes sense to use separate scoped TLS types for
the separate DOM and Flow tree passes, so we can add a different ScopedTLS
type for the Flow pass if we ever need it.
We also reorder the |scope| and |shared| parameters in parallel.rs, because
it aligns more with the order in style/parallel.rs. I did this when I was
adding a TLS parameter to all these functions, which I realized we don't need
for now.
This commit itself only moves things around and adds an extra parameter to the
`apply_declarations` function to eventually handle #14079 correctly.
Probably needs a more granular API to query fonts, á la nsFontMetrics, but
that's trivial to do once this is landed.
Then we should make the font provider mandatory, and implement the missing stylo
bits.
RuleTreeDeclarationsIterator would yield &PropertyDeclaration
with the lifetime of the rule tree, but the reference would only
be valid as long as the iterator was holding the corresponding lock.
The lock would be released when the iterator’s `.next()` method
moves to the next rule tree node, or when the iterator is dropped.
Also change apply_declaration to not require a `Clone` iterator
(since closures unfortunately don’t implement `Clone`).
Instead have it take a callable that returns a fresh iterator.
This patch introduces infrastructure for the rule tree, and constructs it.
We don't use it yet, nor have good heuristics for GC'ing it, but this should not
happen anymore once we store the rule node reference in the node.
I haven't messed up with memory orders because I want to do a try run with it,
then mess with them.
Take down the ApplicableDeclarationsCache, use the rule tree for doing the cascade.
Update Rust to 1.14.0-nightly (7c69b0d5a 2016-11-01)
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Implement matchMedia and MediaQueryList
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Fixes#13376.
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Remove test-geckolib, run test-stylo on travis
test-geckolib used to do things, but almost all of geckolib has been moved to the style crate, with the tests in `tests/unit/stylo`. (`./mach test-stylo) Now test-geckolib does nothing.
Fixes#13721
r? @jdm
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