Refactoring CL -- no intended behavior change. Just removing calls to empty apis.

BUG=skia:6481
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2;master.tryserver.chromium.linux:linux_site_isolation

refactoring CL
TBR=jochen, hubbe, finnur, thestig, wez

Review-Url: https://codereview.chromium.org/2823003002
Cr-Commit-Position: refs/heads/master@{#465770}