Revert several changes that broke tests
This is based on #15158 by @aneeshusa, with additional reverts.
This reverts #15064, which is causing many tests not to run, and #15129 and #15155 which landed while tests were not running and may have caused some new failures in iframe tests.
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Refactor to send iframe resize messages directly from layout thread to constellation
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- [X] These changes fix#14682.
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r? @jdm
passing tests:
tests/wpt/mozilla/tests/css/matchMedia.html, tests/wpt/mozilla/tests/mozilla/window_resize_not_triggered_on_load.html, tests/wpt/mozilla/tests/mozilla/iframe/resize_after_load.html, tests/wpt/mozilla/tests/css/meta_viewport_resize.html
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Check all constellation files for panics
Teaches the `etc/ci/check_no_panic.sh` script to handle directories,
so it can check all constellation files for panics.
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r? @asajeffrey
There are currently 4 `unwrap()`s in `components/constellation/timer_scheduler.rs`; I'm not sure how you want to handle those.
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- [x] These changes fix#14976 (github issue number if applicable).
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Max session fix
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Converted document discarding from an opt into a pref. Updated testing docs and changed all uses to pref api.
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- [X] These changes fix#14960 (github issue number if applicable).
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Minor spelling corrections
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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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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
- [X] There are tests for these changes
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Pipeline documentation comments
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Rewrote the documentation comments for `pipeline.rs`.
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Rename ScriptChan in constellation to EventLoop
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We currently have a type `ScriptChan` in the constellation, which is named after its implementation rather than its semantics. In the spec, the nearest concept seems to be event loop https://html.spec.whatwg.org/multipage/#event-loop.
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Reimplement scrolling to fragments
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- [x] These changes fix#13736, #10753 (github issue number if applicable).
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This reimplemntation of the feature uses ScrollRootIds to scroll
particular scrollable areas of the page.
Fixes#13736.
Fixes#10753.
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Update to webrender 0.10.0
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Changes necessary to build servor with webrender 0.10.0
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