Fixing the test page loading flakiness for YouTube tests

TEST=Ran manually
BUG=chromium:307402, chromium:307396

Change-Id: I5a8fc8bd4f956642eb6799d92531e2105f237492
Reviewed-on: https://chromium-review.googlesource.com/181033
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Reviewed-by: Rohit Makasana <rohitbm@chromium.org>
Commit-Queue: Rohit Makasana <rohitbm@chromium.org>
Tested-by: Rohit Makasana <rohitbm@chromium.org>
1 file changed