tree a039e1db7c94da1bc4629784c42f50395a9ede1f
parent b6095ae05bab1ca3b05c6eca091295cdc922d184
author jvanverth <jvanverth@google.com> 1466111109 -0700
committer Commit bot <commit-bot@chromium.org> 1466111109 -0700

Check for some potential subheap allocation failures.

Need to make sure we can allocate areas larger than our specified
subheap sizes, and deal with potential fragmentation in the main
system heap.
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2072763002

Review-Url: https://codereview.chromium.org/2072763002