Update Rust to 1.14.0-nightly (7c69b0d5a 2016-11-01)
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Layout viewer fixes
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This is a followup for #13432. This patch should be landed after #13740 to accommodate the change in JSON format in #13740. It also included some UI layout fixes to make the UI more readable. I'm splitting the commits for easier review, I'll squash them after a r+.
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Implement matchMedia and MediaQueryList
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Fixes#13376.
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Fold some DisplayList methods into DisplayListBuildState
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This makes the API used to build display lists quite a bit simpler and
reduces the amount of auxiliary data structures that need to be passed
around. It is also important preparation work for separating scrolling
areas from stacking contexts.
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Parsing/Serialization for scroll-snap-points-*
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Implements Parsing/Serialization for scroll-snap-points-x and scroll-snap-points-y
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This matches the previous default (network.mime.sniff off) behaviour in all
but one case: we will now accept a font without a `Content-Type` header, which
would previously have been ignored.
This makes the API used to build display lists quite a bit simpler and
reduces the amount of auxiliary data structures that need to be passed
around. It is also important preparation work for separating scrolling
areas from stacking contexts.
Make style::context use parking_lot::RwLock
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The main motivation is to use `parking_lot::RwLock` instead of `sync::RwLock` in `style::context`, so that we can make `Stylesheet` be hold in a `parking_lot::RwLock` like other structs used for geckolib.
r? @SimonSapin
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