While all allocated objects need to have correct alignment, this requirement
doesn't make a lot of sense for the allocation limit. Removing this assertion
would makes it possible to make the inline-allocation-observers accurate. This
could be done in other ways, but removing this assertion is the most elegant way
to go about it.

R=hpayer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1444883003

Cr-Commit-Position: refs/heads/master@{#32013}