Unable to find the suspect using CL and Find it.
Using Code Search for the file, "BaseRenderingContext2D.cpp" assigning to the concern owner.

Suspecting Commit#
https://chromium.googlesource.com/chromium/src/+/50c83740c5e9efd2ffe380b0f0181e843908172b

@junov -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.

ClusterFuzz has detected this issue as fixed in range 440242:440280.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=4986925812547584

Fuzzer: inferno_twister
Job Type: linux_ubsan_chrome
Platform Id: linux

Crash Type: Float-cast-overflow
Crash Address: 
Crash State:
  SkRect::roundOut
  blink::BaseRenderingContext2D::computeDirtyRect
  blink::BaseRenderingContext2D::clearRect
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=linux_ubsan_chrome&range=435261:438085
Fixed: https://cluster-fuzz.appspot.com/revisions?job=linux_ubsan_chrome&range=440242:440280

Minimized Testcase (0.19 Kb):
Download: https://cluster-fuzz.appspot.com/download/AMIfv95SZ1bXWJW9k5hQ4On5Uq8ctPprMZLphhhKDk-nEu94eeYXySB3bi-FMaRvMyVDnNZqnNEn4U4-ee_4uL1b-c-txevxsTwuKtCNjx7Zb8XiY3y0OWISTq7MZzutVVm24EZ_9MR-vMOdPcuV5VJVpi2pZLxhAQ?testcase_id=4986925812547584
    <script>
            var canvas = document.createElement("canvas");
            context = canvas.getContext("2d");
                context.clearRect(0, 0, 4294967063, -17);
        </script>


See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

ClusterFuzz testcase 4986925812547584 is verified as fixed, so closing issue.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.