cc: Re-enable tile eviction iterator test with occlusion.
This patch re-enables a patch that was timing out on windows. This
code has changed significantly since it was disabled, and it's worth
seeing if the problem went away.
NOTE TO SHERIFFS
================
In case of a cc_unittest timeout (one of TileManager tests with
occlusion), please revert this. I'll monitor how it goes, but I might
miss it in the build.
R=danakj
BUG=401527
Review URL: https://codereview.chromium.org/
588143006
Cr-Commit-Position: refs/heads/master@{#296038}