Correcting test expectations for svg/as-object/sizing/svg-in-object-placeholder-height-*

Associating flakiness with new bug and marking flaky crash on linux debug.

TBR=yutak@chromium.org
BUG=392640

Review URL: https://codereview.chromium.org/379773005

git-svn-id: svn://svn.chromium.org/blink/trunk@177776 bbb929c8-8fbe-4397-9dbb-9b2b20218538