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When setting the visible rect properly, the coded size was
inadvertently also changed to be the visible rect.  This CL puts
it back.

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: I0b041b495bbc5a12095868ac0e6391826a445f77
Reviewed-on: https://chromium-review.googlesource.com/1217753Reviewed-by: Dan Sanders <sandersd@chromium.org>
Commit-Queue: Frank Liberato <liberato@chromium.org>
Cr-Commit-Position: refs/heads/master@{#590105}