GitLab

Now that ForceReclaimResources is gone, frames with no render passes are
only submitted in unit tests. Also, since crrev.com/2835203002 we no
longer allow empty render pass lists to be sent over IPC. Fix the tests
and remove the checks for empty render pass lists in prod to simplify
code.

CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2855723002
Cr-Commit-Position: refs/heads/master@{#469545}