issue flutter/flutter#147739

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The physical size is computed by multiplying the browser's `innerWidth`
and `innerHeight` by the `devicePixelRatio`. The physical size should be
an integer number of pixels. However, there may be some imprecision and
the result of the multiplication is not quite an integer. This change
rounds the physical size to integers before using them for drawing the
scene.

Fixes flutter/flutter#144869

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide] and the [C++,
Objective-C, Java style guides].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I added new tests to check the change I am making or feature I am
adding, or the PR is [test-exempt]. See [testing the engine] for
instructions on writing and running engine tests.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I signed the [CLA].
- [x] All existing and new tests are passing.

If you need help, consider asking for advice on the #hackers-new channel
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https://skia.googlesource.com/skia.git/+log/716e757c1ffb..df970dcd6cfa

2024-05-02 [email protected] [viewer] Add `disable_tint_symbol_renaming` option

If this roll has caused a breakage, revert this CL and stop the roller
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https://dart.googlesource.com/sdk.git/+log/0316fa44b401..03b7868a71ae

2024-05-02 [email protected] Version 3.5.0-127.0.dev

If this roll has caused a breakage, revert this CL and stop the roller
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Please CC [email protected],[email protected] on the revert to ensure that a human
is aware of the problem.

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