SVGAnimatedAngle initial values

This CL implements correct initial values for all SVGAnimatedAngle properties
(which is only one: 'orient' on <marker>.)

Bug: 225807, 589856
Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_slimming_paint_v2;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I61c50162a98a47d0da23f3a7d0830440b8c7aa25
Reviewed-on: https://chromium-review.googlesource.com/1207331
Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#588942}
3 files changed