Remove some svg/custom/ repaint tests from TestExpectations
Remove some svg/custom/ repaint tests from TestExpectations

After getting new baselines in https://codereview.chromium.org/1115723003/
these test now appear green and stable:

  deep-dynamic-updates.svg
  js-update-gradient.svg
  js-update-pattern.svg
  js-update-pattern-child.svg
  js-update-stop.svg
  js-update-stop-linked-gradient.svg
  use-disappears-after-style-update.svg

TBR=pdr@chromium.org
BUG=371651

Review URL: https://codereview.chromium.org/1115213006

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@194872 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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