Remove texture and sampler related code in RasterDecoder.

RasterDecoder uses skia to do rendering, and skia can restore texure
and sampler bindings by itself. So we don't need use ContextState to
do it.

Bug: 902904
Change-Id: I5ce2510b4616aab9087cd61bfbfb88368c6e34ab
Reviewed-on: https://chromium-review.googlesource.com/c/1338159
Commit-Queue: Peng Huang <penghuang@chromium.org>
Reviewed-by: Antoine Labour <piman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611396}
4 files changed