stop passing |level| to WebGraphicsContext3D

|level| is no longer used as a result of crbug.com/443151.
So currently video canvas painting is broken as the call has an empty implementation.

BUG=485482

Review URL: https://codereview.chromium.org/1138343004

Cr-Commit-Position: refs/heads/master@{#329533}
(cherry picked from commit da4ca3a7643509d64f53529fdb63af6a219aee07)

R=sievers@chromium.org

Review URL: https://codereview.chromium.org/1162713003

Cr-Commit-Position: refs/branch-heads/2357@{#457}
Cr-Branched-From: 59d4494849b405682265ed5d3f5164573b9a939b-refs/heads/master@{#323860}
1 file changed