Increase maximum width/height of canvas.

Fixes WebGL conformance test:
conformance2/textures/misc/tex-subimage3d-canvas-bug.html

The test expects to be able to create a canvas larger than 32767 in
height. Skia seems to support this, and there have been user requests
for it.

Bug: 859400, 339725, skia:2122
Change-Id: Ibba89e98178bd73817c7b4cbdf569e89ee5764b1
Reviewed-on: https://chromium-review.googlesource.com/c/1356555
Reviewed-by: Fernando Serboncini <fserb@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: James Darpinian <jdarpinian@chromium.org>
Cr-Commit-Position: refs/heads/master@{#613225}
3 files changed