Fix naming of SVG{AnimatedProperty,PropertyTearOff}Base::contextElement

contextElement -> ContextElement

Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_slimming_paint_v2;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: If22cc5a0624cfaf9e1e448198c891de3030bc889
Reviewed-on: https://chromium-review.googlesource.com/1181058
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#584435}
10 files changed