Appveyor: Use ccache on Windows GNU builds
r? @larsbergstrom
Locally tested:
First run: (Build time: 26:27)
```
cache directory C:/github/servo/.servo/.ccache
primary config C:/github/servo/.servo/.ccache/ccache.conf
secondary config (readonly) C:/building/msys64/mingw64/etc/ccache.conf
cache hit (direct) 0
cache hit (preprocessed) 0
cache miss 953
called for link 5
called for preprocessing 9
compile failed 6
preprocessor error 30
unsupported source language 1
autoconf compile/link 43
no input file 6
files in cache 2523
cache size 443.0 MB
max cache size 5.0 GB
```
Second run: (Build time: 15:30)
```
cache directory C:/github/servo/.servo/.ccache
primary config C:/github/servo/.servo/.ccache/ccache.conf
secondary config (readonly) C:/building/msys64/mingw64/etc/ccache.conf
cache hit (direct) 922
cache hit (preprocessed) 31
cache miss 953
called for link 10
called for preprocessing 18
compile failed 12
preprocessor error 60
unsupported source language 2
autoconf compile/link 86
no input file 12
files in cache 2523
cache size 443.0 MB
max cache size 5.0 GB
```
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webgl: test expectation updates
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This series cherry-picks some diffs from a full
./mach update-wpt --ignore-existing
on the webgl conformance tests, all of which I think are just leftovers from previous fixes.
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Index the session past correctly when discarding.
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Oops, indexed from the wrong end when discarding documents in #14312.
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Use tinyfiledialogs from crates.io
Use the crates.io version of tinyfiledialogs instead of pulling directly from the git repository.
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Implement browsing context discarding
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Implement browsing context discarding (https://html.spec.whatwg.org/multipage/browsers.html#discard-a-document).
* When a pipeline is closed, inform the script thread whether the browsing context is to be discarded.
* In script threads, synchronously discard any similar-origin documents and browsing contexts.
* When a browsing context is discarded, it loses the reference to the active document, but the window keeps it, so we need to move the `Document` pointer from `BrowsingContext` to `Window`.
* Fix the webIDL for Window to make parent and top optional (the spec says they can return null when the browsing context is discarded).
---
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- [X] These changes fix#14411
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At least, it looks to me like that's what these were from -- they're
in about the right places to be from us previously missing
checkFramebufferStatus().
Remove some unsound JSVal handling in JsTimerTask::invoke.
We were using Handles to *copies* of the traced values, rather than the
originals.
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Allow cli prefs to have numerical value
I'm not sure as I'm new with servo but shouldn't the new function ```parse_opt_prefs``` be in ```prefs.rs``` instead of ```opts.rs``` ?
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- [X] These changes fix#14842
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An in-memory RNG that shares its file descriptor.
<!-- Please describe your changes on the following line: -->
This PR implements an in-memory random number generator that only uses an OS RNG for (re)seeding. The OS RNG is shared, so there's only one file descriptor for `/dev/urandom` being used.
The PR also implements a tidy check that we don't accidentally introduce an RNG. Rather annoyingly, there are a lot of transitive dependencies on `rand`, notably hash maps in `std`.
This PR makes it possible to use uuids for identifiers such as pipeline and frame ids.
---
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Add support for -moz-top-layer
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r? @Manishearth
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animation-iteration-count property is a number instead of integer.
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This is a revised PR for #14732.
@emilio?
---
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webgl: implement bufferData
<!-- Please describe your changes on the following line: -->
Adds support for the other overload of bufferData, fixing many conformance tests. In the process I had to fix the webidl codegen in the overload-distinguished-by-an-object case. Also includes a little fix for glEnable() validation.
---
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Stop using global initial styles for stylo; the initial styles need to be per-document
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