commit e6d7ca65321982ca63c4fceda45f659e644c7d66
author fs@opera.com <fs@opera.com> Tue Sep 22 21:05:39 2015
committer fs@opera.com <fs@opera.com> Tue Sep 22 21:05:39 2015
tree 4afd37a6f27242de83a650c4cc7642a51daa749a
parent 7f72efd257ec544cdf9cd5ce000f8af2a030963a

Update handling of negative radius for feMorphology

Spec[1] states:

 "A negative or zero value disables the effect of the given filter
  primitive (i.e., the result is the filter input image)."

So change FEMorphology to clamp radii to non-negative and stop treating
as an error in SVGFEMorphologyElement::build.

[1] https://drafts.fxtf.org/filters/#element-attrdef-femorphology-radius

BUG=533457

Review URL: https://codereview.chromium.org/1344283004

git-svn-id: svn://svn.chromium.org/blink/trunk@202644 bbb929c8-8fbe-4397-9dbb-9b2b20218538