Make unaccelerated canvas resources transferable

BUG=788439
TBR=fserb@chromium.org

Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_slimming_paint_v2;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I04200ce9cc3a8e3ab88d6d87d89630a41bd13e98
Reviewed-on: https://chromium-review.googlesource.com/1144258
Commit-Queue: Justin Novosad <junov@chromium.org>
Reviewed-by: Justin Novosad <junov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576698}
2 files changed