Add use counter for SVG geometry properties unitless values

Add the kSVGGeometryPropertyHasNonZeroUnitlessValue use counter for
non-zero unitless (<number> / "user units") values in the 'x', 'y', 'r',
'rx', 'ry', 'cx' and 'cy' properties.

Bug: 899074
Change-Id: I1a7e6cdce018a75ed46745ec245dabcaed5ea954
Reviewed-on: https://chromium-review.googlesource.com/c/1301597
Reviewed-by: Rune Lillesveen <futhark@chromium.org>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#603454}
12 files changed