Revert of Add effect node support in PaintArtifactCompositor for layer list mode [4/4] (patchset #7 id:120001 of https://codereview.chromium.org/2052763002/ )

Reason for revert:
This CL seems making webkit_unit_tests' failures.

https://findit-for-me.appspot.com/waterfall/build-failure?url=https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20(dbg)/builds/8344

https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Linux%20(dbg)/builds/8334

Original issue's description:
> 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
>
> Committed: https://crrev.com/889b2a8057be02fefc2fdd9e5deb289844f94040
> Cr-Commit-Position: refs/heads/master@{#404575}

TBR=jbroman@chromium.org,chrishtr@chromium.org,trchen@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=609937

Review-Url: https://codereview.chromium.org/2138663002
Cr-Commit-Position: refs/heads/master@{#404622}
2 files changed