Implement AnalyserNode
<s>Needs https://github.com/servo/media/pull/127 to land (and a dependency
update)</s>
r? @ferjm
realtimeanalyser-fft-scaling.html, the test that actually checks for some level of FFT correctness, sadly doesn't work since we don't process nodes not connected to the destination.
However I locally fixed the test to work differently and it passed. We'll fix the processing model eventually.
<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/21712)
<!-- Reviewable:end -->
I always see a bunch of time in our profiles in the iterator over the
declarations, this ensures it's not something dumb.
I suspect it's just a bunch of cache misses from walking the rule tree but in
any case this is consistent with the other getters we have and such.
Differential Revision: https://phabricator.services.mozilla.com/D5971
I think it used to be the case that all PropertyDeclaration variants had a
DeclaredValueOwned<T> inside. But that's no longer the case, so this abstraction
seems less useful now.
Differential Revision: https://phabricator.services.mozilla.com/D5978
There are a few mentions of nsRuleNode left but they are mostly
historical references so it makes sense to keep them.
Differential Revision: https://phabricator.services.mozilla.com/D5505
Make tests for uninitialized renderbuffers pass
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#13710
- [x] There are tests for these changes
<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/21717)
<!-- Reviewable:end -->
Create ScriptMsg::GetBrowsingContextInfo
Script used to send two messages to constellation to first retrieve the id of the browsing context in which a pipeline resides and then its parent pipeline's id. This patch introduces a minor optimization to instead retrieve those fields in a single message.
Also, fixed a potential bug introduced in #21559 where if a browsing context wasn't found for a pipeline in response to `GetParentInfo` (which is now deleted), constellation sent nothing back, presumably causing the script thread to hang on the receiving channel.
---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix#21703 (github issue number if applicable).
<!-- Either: -->
- [ ] There are tests for these changes OR
- [x] These changes do not require tests because no new behaviour was introduced.
<!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.-->
<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->
<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/21705)
<!-- Reviewable:end -->
