GitLab

GLES2DecoderImpl hooks into GLStateRestorer for virtual context
switching. These hooks work even without enabling virtual contexts and
are used in DirectContextProvider::SetGLRendererCopierRequiredState.

GLES2DecoderPassthroughImpl does not have any state restoration hooks.
This CL explicitly sets state used by GLRendererCopier, GLScaler, and
GLI420Converter.

Bug: 1016833
Change-Id: I7ebead5148411677765b3d4635871873b7af0018
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1912907Reviewed-by: kylechar <kylechar@chromium.org>
Commit-Queue: Jonathan Backer <backer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#714733}