fast/workers/shared-worker-name.html is flaky on Linux and Mac

Add this test to TestExpectations with [ Pass Crash ] for those platforms.

BUG=343892
NOTRY=true

Review URL: https://codereview.chromium.org/165393005

git-svn-id: svn://svn.chromium.org/blink/trunk@167202 bbb929c8-8fbe-4397-9dbb-9b2b20218538