chore: cherry-pick 56de3b2004, bbca3704f9 and f2b0985ac3 from chromium

[ppontes]

Introduce CrossThreadCopier

Allow immutable SkBitmap to be transferred across threads.

(cherry picked from commit fd794ad56432870e462aab9d62e4f059169c1a5f)

Bug: 1241091
Change-Id: Ia771893245ef2fc1acb05cd4906d64bf2dd406fe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3244824
Reviewed-by: danakj danakj@chromium.org
Reviewed-by: Florin Malita fmalita@chromium.org
Commit-Queue: Yutaka Hirano yhirano@chromium.org
Cr-Original-Commit-Position: refs/heads/main@{#936435}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3267808
Bot-Commit: Rubber Stamper rubber-stamper@appspot.gserviceaccount.com
Reviewed-by: Kentaro Hara haraken@chromium.org
Cr-Commit-Position: refs/branch-heads/4664@{#887}
Cr-Branched-From: 24dc4ee75e01a29d390d43c9c264372a169273a7-refs/heads/main@{#929512}

==========

Allow null SkBitmap to be transferred across threads

(cherry picked from commit dad0c0e5162bcc49b8f60354d3bca92224d8381b)

Bug: 1241091
Change-Id: Ie96932c14c8884d6d3eafa76dab5043e7aa31888
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3251815
Reviewed-by: Florin Malita fmalita@chromium.org
Commit-Queue: Yutaka Hirano yhirano@chromium.org
Cr-Original-Commit-Position: refs/heads/main@{#936861}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3268018
Auto-Submit: Yutaka Hirano yhirano@chromium.org
Reviewed-by: Kentaro Hara haraken@chromium.org
Commit-Queue: Kentaro Hara haraken@chromium.org
Cr-Commit-Position: refs/branch-heads/4664@{#893}
Cr-Branched-From: 24dc4ee75e01a29d390d43c9c264372a169273a7-refs/heads/main@{#929512}

==========

Use WeakPtrs for the ThreadedIconLoader's background tasks.

(cherry picked from commit f0375e38d259b3651fd9f305ca2e723ca9c02c64)

Bug: 1241091
Change-Id: I35b9cf705f1c5ffa2a719e47aec7b0f7d98ddc6b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3222803
Reviewed-by: Michael Lippautz mlippautz@chromium.org
Reviewed-by: Yutaka Hirano yhirano@chromium.org
Reviewed-by: Kentaro Hara haraken@chromium.org
Commit-Queue: Kentaro Hara haraken@chromium.org
Auto-Submit: Rayan Kanso rayankans@chromium.org
Cr-Original-Commit-Position: refs/heads/main@{#937427}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3269570
Auto-Submit: Yutaka Hirano yhirano@chromium.org
Commit-Queue: Yutaka Hirano yhirano@chromium.org
Cr-Commit-Position: refs/branch-heads/4664@{#897}
Cr-Branched-From: 24dc4ee75e01a29d390d43c9c264372a169273a7-refs/heads/main@{#929512}

Release Notes

Notes: Backported fix for CVE-2021-38005.

[jkleinsc]

Merging as CI failures are unrelated to PR change and are resolved in:

• fix: generate valid config.gypi #31989

[release-clerk]

Release Notes Persisted

Backported fix for CVE-2021-38005.