(Reland) Add effect node support in PaintArtifactCompositor for layer list mode [4/4]

This CL adds a local EffectStack class similar to ClipManager, that keep track
of effect state and assign generated cc effect node to layers. This is only
used for layer list mode.

BUG=609937

Review-Url: https://codereview.chromium.org/2145753002
Cr-Commit-Position: refs/heads/master@{#405432}
2 files changed