Re-enable graphics_WebGLAquarium from buildbots testing.

With some recent changes to the test_that invocation this should work
now.
Still there is an issue with benchmarks that require compilation
for the particular board. That remains to be fixed.

BUG=chromium:551710
TEST=None. This is a revert.

Change-Id: I547a4853302f11dc58ddc493ee5368b1e2d33c0e
Reviewed-on: https://chrome-internal-review.googlesource.com/241035
Commit-Ready: Luis Lozano <llozano@chromium.org>
Tested-by: Luis Lozano <llozano@chromium.org>
Reviewed-by: Caroline Tice <cmtice@google.com>
2 files changed