Harmonize FilterEffect::mapRect and mapPaintRect
This CL terminates the FilterEffect::determineAbsolutePaintRect codepath,
replacing the last user (SVGFilterPainter) with mapRect().
A new structure for FilterEffect::mapRect is introduced (taking some
hints from the SkImageFilter implementation), where mapRect is the entry-
point (replacing mapRectRecursive), which in turn calls: 1) mapInputs,
2) mapEffect and 3) applyBounds. The last simply applies any clip bounds
set on the effect, while also adjusting for affectsTransparentPixels().
mapInputs() computes the contribution from inputs to the current effect,
while mapEffect() applies the contribution from the current effect
itself. The notion of forward/reverse is not retained since only forward
mapping is used.
BUG=642035, 640264, 611674, 600430
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Review-Url: https://codereview.chromium.org/2341923002
Cr-Commit-Position: refs/heads/master@{#420293}
80 files changed
