[skia-sync] Merge upstream chrome/m151 bug fixes

[mattleibow]

Automated upstream bug-fix sync for m151.

Companion skia PR: mono/skia#275

mono/SkiaSharp — Merge upstream chrome/m151 bug fixes

Companion to the mono/skia PR (skia-sync/m151) that merges 2 new
upstream commits (docs + infra) on top of our current m151 base.

• Base branch: main
• Head branch: skia-sync/m151
• Submodule pointer: 5209f4a49b → 67d4e950785b19ffa49ff1a8fd5f440ec628340d

Breaking change analysis

None. CURRENT == TARGET == m151, so this is a same-milestone
bug-fix sync. The 2 upstream commits picked up (see the mono/skia PR
summary) touch only RELEASE_NOTES.md, relnotes/*.md, and
infra/bots/*.json — no C++, no C API headers/implementations, no
DEPS. Consequently there is no risk of API surface, ABI, or behaviour
regression for downstream consumers.

Version file updates

Because it is a same-milestone sync, no version bumps were made:

File	Change
scripts/VERSIONS.txt	(unchanged) — milestone / soname / assembly / file / nuget lines all stay at 151 / 151.0.0 / …
scripts/azure-templates-variables.yml	(unchanged)
externals/skia/include/c/sk_types.h (SK_C_INCREMENT)	(unchanged, still 0)
cgmanifest.json (commitHash for mono/skia)	5209f4a49b55104de2c521fc6f605aee530e4cd8 → 67d4e950785b19ffa49ff1a8fd5f440ec628340d
cgmanifest.json (upstream_merge_commit for CVE tracking)	79e2e1538e94bb1d6b5bbbc56279036aa7574b10 → 1536d3975057297af8087d22419f6c95dc96305d

chrome_milestone stays at 151.

Binding regeneration

Ran pwsh .agents/skills/update-skia/scripts/regenerate-bindings.ps1:

--- Binding diff summary ---
  No changes to bindings (C API signatures unchanged)

--- New generated functions (may need C# wrappers) ---
  No new functions found

✅ Phase 8 complete

git status after regeneration is clean apart from the already-known
cgmanifest.json / submodule-pointer edits — no *.generated.cs files
were modified. HarfBuzz bindings were auto-reverted by the script as
usual (unchanged in practice).

C# wrapper changes

None. No new C API functions ⇒ no new wrappers needed.

Build & test results (Linux x64)

• Native build (Phase 7): dotnet cake --target=externals-linux --arch=x64 — success (15m 43s total; libSkiaSharp 14m 16s, libHarfBuzzSharp 1m 11s). Both libSkiaSharp.so.151.0.0 and libHarfBuzzSharp.so.0.61421.0 produced in output/native/linux/x64/.

• C# build (Phase 9): dotnet build binding/SkiaSharp/SkiaSharp.csproj — success, 0 warnings, 0 errors across all TFMs (netstandard2.0/2.1, net462/48, net6.0, net9.0, net10.0, net9.0-android35.0, net10.0-android36.0).

• Tests (Phase 10): dotnet test tests/SkiaSharp.Tests.Console/SkiaSharp.Tests.Console.csproj (net10.0 / x64):

  Passed! - Failed: 0, Passed: 5584, Skipped: 172, Total: 5756, Duration: 2m 41s
  

  Full log at /tmp/gh-aw/agent/test-output.txt (uploaded as workflow
  artifact). Note: a --filter "Category=Smoke" was requested but the
  new Microsoft.Testing.Platform runner emitted MTP0001 warning VSTest-specific properties are set but will be ignored and executed
  the full suite instead — which is the stronger signal we actually
  need, so no re-run was necessary.

Items needing human attention

None. This is a low-risk, docs/infra-only upstream sync with a green
full build + test on Linux x64. Other platforms
(Windows/macOS/iOS/Android/WASM) will be exercised by CI on this PR.

Created by skia-upstream-sync.

[github-actions]

📦 Try the packages from this PR

Warning

Do not run these scripts without first reviewing the code in this PR.

Step 1 — Download the packages

bash / macOS / Linux:

curl -fsSL https://raw.githubusercontent.com/mono/SkiaSharp/main/scripts/get-skiasharp-pr.sh | bash -s -- 4302

PowerShell / Windows:

iex "& { $(irm https://raw.githubusercontent.com/mono/SkiaSharp/main/scripts/get-skiasharp-pr.ps1) } 4302"

Step 2 — Add the local NuGet source

dotnet nuget add source ~/.skiasharp/hives/pr-4302/packages --name skiasharp-pr-4302

More options

Option	Description
--successful-only / -SuccessfulOnly	Only use successful builds
--force / -Force	Overwrite previously downloaded packages
--list / -List	List available artifacts without downloading
--build-id ID / -BuildId ID	Download from a specific build

Or download manually from Azure Pipelines — look for the nuget artifact on the build for this PR.

Remove the source when you're done:

dotnet nuget remove source skiasharp-pr-4302

[github-actions]

📖 Documentation Preview

The documentation for this PR has been deployed and is available at:

🔗 View Staging Site
🔗 View Staging Docs
🔗 View Staging Gallery (Blazor)
🔗 View Staging Gallery (Uno Platform)
🔗 View Staging SkiaFiddle

This preview will be updated automatically when you push new commits to this PR.

---

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