layout: Remove the obsolete layout tracing functionality (#35001)

There were two kinds of layout tracing controlled by the same debugging
option:

 - modern layout: Functionality that dumped a JSON serialization of the
   layout tree before and after layout.
 - legacy layout: A scope based tracing that reported the process of
   layout in a structured way.

I don't think anyone working on layout is using either of these two
features. For modern layout requiring data structure to implement
`serde` serialization is incredibly inconvenient and also generates a
lot of extra code.

We also have a more modern tracing functionality based on perfetto that
we have started to use for layout and IMO it's actually being used and
more robust.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2025-01-15 14:24:14 +01:00 committed by GitHub
parent 2cd5e1356c
commit e81951a973
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45 changed files with 64 additions and 675 deletions

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@ -8,7 +8,6 @@ use std::cell::LazyCell;
use std::ops::{Add, AddAssign};
use app_units::Au;
use serde::Serialize;
use style::properties::ComputedValues;
use style::values::computed::LengthPercentage;
use style::Zero;
@ -34,7 +33,7 @@ pub(crate) enum IntrinsicSizingMode {
Size,
}
#[derive(Clone, Copy, Debug, Default, Serialize)]
#[derive(Clone, Copy, Debug, Default)]
pub(crate) struct ContentSizes {
pub min_content: Au,
pub max_content: Au,
@ -257,7 +256,7 @@ pub(crate) fn outer_inline(
}
}
#[derive(Clone, Copy, Debug, Serialize)]
#[derive(Clone, Copy, Debug)]
pub(crate) struct InlineContentSizesResult {
pub sizes: ContentSizes,
pub depends_on_block_constraints: bool,