[CoordinatedGraphics] Typo in argument decoder for CoordinatedGraphicsState
https://bugs.webkit.org/show_bug.cgi?id=117384

Patch by Jae Hyun Park <jae.park@company100.net> on 2013-06-09
Reviewed by Noam Rosenthal.

For CSS Shaders, it must decode state.customFiltersToRemove instead of
state.updateAtlasesToRemove.

* Shared/CoordinatedGraphics/CoordinatedGraphicsArgumentCoders.cpp:
(CoreIPC::::decode):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@151364 268f45cc-cd09-0410-ab3c-d52691b4dbfc