Sync some media/track test expectations.

Remove entries that were asserting prior to crbug.com/521520 being fixed.

R=haraken,keishi
BUG=521102,521861
NOTRY=true

Review URL: https://codereview.chromium.org/1311733002

git-svn-id: svn://svn.chromium.org/blink/trunk@201051 bbb929c8-8fbe-4397-9dbb-9b2b20218538
1 file changed