Fix LayoutTest transitions/zero-duration-with-non-zero-delay-start.html

When a transition has zero duration but non-zero delay, the it should wait for
the delay time to elapse, then transition instantaneously. Both the legacy and
Web Animations transitions implentations respect this. This is confirmed by
running this test in real-time mode in content_shell.

However, the testing pause API (used in non-real-time mode) for the legacy
implementation does not account for start delay. The existing expected result
for this test used 'incorrect' values to account for this, causing the test to
pass in non-real-time mode, but fail in real-time-mode.

This change updates the expected result to use the correct values. It therefore
fails in non-real-time-mode with the legacy implementation. It also makes the
test itself a little more robust.

R=timloh@chromium.org

Review URL: https://codereview.chromium.org/47743014

git-svn-id: svn://svn.chromium.org/blink/trunk@160978 bbb929c8-8fbe-4397-9dbb-9b2b20218538