Rerebaseline http/tests/misc/object-embedding-svg-delayed-size-negotiation-2.htm

This was rebaselined in http://src.chromium.org/viewvc/blink?revision=177757&view=revision,
but the XP result was wrong because the test flaky timed out that run.

BUG=392626
TBR=eae@chromium.org

Remove some stale lines from TestExpectations.

Linux Aura is long-shipped and the bug is marked fixed.

BUG=318980

Review URL: https://codereview.chromium.org/381543003

git-svn-id: svn://svn.chromium.org/blink/trunk@177791 bbb929c8-8fbe-4397-9dbb-9b2b20218538