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When producing Path objects, arcs are converted to conic segments, and
when iterating those with Path::Apply(...) they are converted to
quadratic beziers. So the arc semantics are lost when
SVGMarkerDataBuilder gets the resulting segment. Thus it produces
markers for each quadratic bezier, which is incorrect.

Teach SVGMarkerDataBuilder to operate on the original path data too by
accepting SVGPathByteStreams, and contort the arc segments into single
(faux) beziers with matching properties (same start/end tangents). This
allows reuse of the rest of the marker data builder machinery.
Use the new code-path for the cases which can contain arc segments
(<path> elements with 'd').

Bug: 583097
Change-Id: I20d772bb2ab67cd686160ab437d7d16fbc81e3c9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1950999
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Cr-Commit-Position: refs/heads/master@{#722425}