This is the fifth commit in the series of updating all the old svg
animation tests.

The usage of testharness has replaced the older SVGAnimationTest.js
for all where it's suitable. No functionality should have changed
and the tests should cover almost the same.

In all of the animations where there is a sampling at T=0, where
it was assumed that no animations had started. Which didn't work
flawlessly when moved to the new system, it has thus been removed.

Bug: 985335
Change-Id: I34fc15e34d01f774c7992ed6c1d79d9e86cd9409
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1753003


Auto-Submit: Edvard Thörnros <edvardt@opera.com>
Commit-Queue: Stephen Chenney <schenney@chromium.org>
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Cr-Commit-Position: refs/heads/master@{#687295}