Format components debugger and deny_public_fields #21373
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```bash
rustfmt components/debugger/*.rs
rustfmt components/deny_public_fields/*.rs
```
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correct currentSrc function
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(recreating PR which got closed earlier https://github.com/servo/servo/pull/21521)
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Introduce task queues, and throttling performance timeline tasksource
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Update bindgen to 0.39.0
This fixes a build error for i686-linux-android with some versions of libclang:
```rust
error[E0560]: struct `generated::root::JS::Value` has no field named `__bindgen_align`sys
--> /home/simon/projects/mozjs/src/jsval.rs:83:2
|
83 | __bindgen_align: [],
| ^^^^^^^^^^^^^^^ `generated::root::JS::Value` does not have this field
|
= note: available fields are: `data`
error: aborting due to previous error
```
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Add AudioListener/AudioPanner DOM interfaces
Seems to work.
I'll need some changes to the servo-media side to support the panner
node getters as well as the older `setPosition()`/etc APIs. I'll get to
those later.
r? @ferjm
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This fixes a build error for i686-linux-android with some versions of libclang:
```
error[E0560]: struct `generated::root::JS::Value` has no field named `__bindgen_align`sys
--> /home/simon/projects/mozjs/src/jsval.rs:83:2
|
83 | __bindgen_align: [],
| ^^^^^^^^^^^^^^^ `generated::root::JS::Value` does not have this field
|
= note: available fields are: `data`
error: aborting due to previous error
```
Replace Servo DL items with WR ones
The Servo internal display list items are already pretty much
equivalent to the WebRender ones. Except that Servo items contain
base information and associated glyphs and gradient stops which are
stored implicitly in WebRender. Remove the display items for
rectangles, text, images, border, gradients and box shadow and
replace them with their WebRender counter parts.
Some more internal items like line, text shadow and iframe can definitively be replaced with WebRender equivalents but I think the PR is already quite huge. If WebRender would expose a quite minimal API which allowed servo to directly push items onto the display list most of webrender_helpers boilerplate code could go away. As WebRender performs normalization of gradients this would need to be called by servo explicitly in this case.
It should be noted that gradient borders don't actually work neither with the old version nor with this PR as the measurements are all set to zero.
Part of #19676
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Remove outdated comment in stylist.rs
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This comment on `cascade_style_and_visited` is unclear because it refers to `is_link`, which is not a parameter of that function. It used to refer to a flag in `CascadeFlags` back when there was a `cascade_flags: CascadeFlags` parameter; that parameter was removed in commit cd04664. I don't believe it accurately reflects how the code works anymore, and is best just removed.
---
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- [X] These changes do not require tests because they only touch comments
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