[SVG2] css 'outline' property should apply to svg elements
The 'outline' property was only partially working in svg before this patch,
this makes it work on text and text content child elements too.
This makes SVG render the outlines as part of the foreground paint phase.
Partly based on Florin Malita's webkit patch https://bugs.webkit.org/show_bug.cgi?id=113666#c12.
BUG=369473
Review URL: https://codereview.chromium.org/261773008
git-svn-id: svn://svn.chromium.org/blink/trunk@174186 bbb929c8-8fbe-4397-9dbb-9b2b20218538
27 files changed
