Findit identified the culprit r579746 with confidence 70.0% in the config "chromium.linux / Linux Tests"
based on the flakiness trend:

https://findit-for-me.appspot.com/waterfall/flake?key=ag9zfmZpbmRpdC1mb3ItbWVyrwELEhdNYXN0ZXJGbGFrZUFuYWx5c2lzUm9vdCJ5Y2hyb21pdW0ubGludXgvTGludXggVGVzdHMvNzE1ODIvd2Via2l0X2xheW91dF90ZXN0cy9jM1puTDJSdmJTOXlaVzF2ZG1VdGRYTmxMWFJoY21kbGRDMWxiR1Z0Wlc1MExXbHVaR2x5WldOMGJIa3VhSFJ0YkE9PQwLEhNNYXN0ZXJGbGFrZUFuYWx5c2lzGAEM

If the culprit above is wrong, please file a bug using this link and hit submit:
https://bugs.chromium.org/p/chromium/issues/entry?status=Unconfirmed&labels=Pri-1,Test-Findit-Wrong&components=Tools%3ETest%3EFindit%3EFlakiness&summary=%5BFindit%5D%20Flake%20Analyzer%20-%20Wrong%20result%20for%20svg/dom/remove-use-target-element-indirectly.html&comment=Link%20to%20Analysis%3A%20https://findit-for-me.appspot.com/waterfall/flake?key=ag9zfmZpbmRpdC1mb3ItbWVyrwELEhdNYXN0ZXJGbGFrZUFuYWx5c2lzUm9vdCJ5Y2hyb21pdW0ubGludXgvTGludXggVGVzdHMvNzE1ODIvd2Via2l0X2xheW91dF90ZXN0cy9jM1puTDJSdmJTOXlaVzF2ZG1VdGRYTmxMWFJoY21kbGRDMWxiR1Z0Wlc1MExXbHVaR2x5WldOMGJIa3VhSFJ0YkE9PQwLEhNNYXN0ZXJGbGFrZUFuYWx5c2lzGAEM

Automatically posted by the findit-for-me app (https://goo.gl/Ot9f7N).

keishi@ PTAL.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d5f83f6064dd6c79f4ea9aad16c62b9c089eb8fb

commit d5f83f6064dd6c79f4ea9aad16c62b9c089eb8fb
Author: Rakina Zata Amni <rakina@chromium.org>
Date: Wed Aug 08 03:08:07 2018

Disable flaky SitePerProcessHitTestBrowserTest.TouchActionAckTimeout

TBR=kenrb@chromium.org

Bug: 871105
Change-Id: I1adc0dbcea30c6716238f309535cb46e91038891
Reviewed-on: https://chromium-review.googlesource.com/1166602
Reviewed-by: Rakina Zata Amni <rakina@chromium.org>
Commit-Queue: Rakina Zata Amni <rakina@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581456}
[modify] https://crrev.com/d5f83f6064dd6c79f4ea9aad16c62b9c089eb8fb/content/browser/site_per_process_hit_test_browsertest.cc

Failure expectations added in https://chromium-review.googlesource.com/c/chromium/src/+/1166562.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/167a1685c3314ac1acf6ee4e759272bca54839b7

commit 167a1685c3314ac1acf6ee4e759272bca54839b7
Author: Rakina Zata Amni <rakina@chromium.org>
Date: Wed Aug 08 04:55:28 2018

Disable Layout test flaky fail, timeout, crash

TBR=futhark@chromium.org

Bug:  869470 ,871105,872025, 871416 
Change-Id: Iab76b2330c889d36243f95f3c105f9bba7568819
Reviewed-on: https://chromium-review.googlesource.com/1166564
Commit-Queue: Rakina Zata Amni <rakina@chromium.org>
Reviewed-by: Rakina Zata Amni <rakina@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581476}
[modify] https://crrev.com/167a1685c3314ac1acf6ee4e759272bca54839b7/third_party/WebKit/LayoutTests/TestExpectations

I guess this is not a P1 after all.

(Going through P0/P1 of Blink>MemoryAllocator.)