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This is the first 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.

Bug 985335

Change-Id: Icd94f4345cda61f9328abfb18caeed2b747dde93
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1729088
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@{#683137}