These tests either pass on Firefox or are bugs in Firefox.

Bug: 745778
Change-Id: I0a2997d5c3602f026e5cf9132a68a833c975d32d
Reviewed-on: https://chromium-review.googlesource.com/1042801
Reviewed-by: Hongchan Choi <[email protected]>
Commit-Queue: Raymond Toy <[email protected]>
Cr-Commit-Position: refs/heads/master@{#555882}