My change is certainly unrelated, and I don't see anything suspicious in that range. I would guess that the regression range is incorrect, marking untriaged for help from blink/touch folks, and tagging Needs-Bisect to double check the regression range.

Above issue is reproducible on latest canary version i.e 57.0.2952.0

Re-bisected the above issue ,below is the Narrow bisect range:
https://chromium.googlesource.com/chromium/src/+log/7abf8d02361194aaf12bc8d962d5dfd7832365e0..813fe9380b32017f9187b9fb1172354bd2763d65?pretty=fuller&n=10000

Suspecting:r433044?

Kindly help to re-assign if your change is not the cause for this issue.

My change is just a rename so not related to this.

I actually have no idea who's patch this could be. Could we get a narrower regression range please?

Re-bisected the above issue ,below is the Narrow bisect range:

Good build: 54.0.2840.0 (Revision: 410913).
Bad build: 55.0.2841.0 (Revision:414854).

CHANGELOG URL:
https://chromium.googlesource.com/chromium/src/+log/f0c41ef01d1ef97872bb0f97d8c0e0a6d0884baf..5544c19b4252cbf65eea6894d55b2ed486957079

Review-Url: https://codereview.chromium.org/2242923002

dcheng@  could you please look into this issue if it is related to your change,else please help us in finding the appropriate owner for this issue.

Thanks.

I don't think it's my CL. How was the changelog URL derived? I get a very different list of CLs:
https://chromium.googlesource.com/chromium/src/+log/54.0.2840.0..55.0.2841.0?pretty=fuller&n=10000

I don't honestly know what's wrong here though. Maybe something with invalidations? I see https://chromium.googlesource.com/chromium/src/+/0a848fcd4d159ff31f30aa20f4c0d6fd7a6a4123 landed during this time, but I have no idea if it could cause the artifacts in question. +wangxianzhu, any ideas?

My change is for spv2 only which is not enabled by default yet.

Perhaps another bisect is helpful to make sure the regression range is correct.

Thanks for the report.

Able to reproduce the issue on Win 10 (Touch screen machine) using Chrome Canary #57.0.2965.0,Stable #55.0.2883.87 and reported version-57.0.2951.0.

This is non-regression issue which is existing from M35 builds onwards.

Observed Unwanted white patch is seen after pinch to zoom in/out.

Please find the attached screenshot for reference.

Deleted: 674110.mp4 5.1 MB

	674110.mp4 5.1 MB View Download

The white patches are checkerboarding, which is the expected behavior when we haven't finished rastering a portion of the page.

If checkerboarding had suddenly become worse on this page, that would be something to investigate, but according to #8 this has been happening since M35. So I think we can close this.