GitLab

This reverts commit be9cde47.

Reason for revert: broke media lab bots

Original change's description:
> Allow loading SwiftShader after sandbox init on Mac
> 
> We could blacklist WebGL based on GL version, which is after creating a context.
> 
> Right now this will trigger a failure and GPU process will exit and then
> relaunch with SwiftShader mode, which pre-load SwiftShader before sandbox init.
> 
> So users will not notice, but this GPU process exit and relaunch is less optimal
> and unnecessary.
> 
> BUG=897914
> TEST=manual
> R=​kerrnel@chromium.org,kbr@chromium.org,sugoi@chromium.org
> 
> Change-Id: Idcd018ca1f2e5161002cdae4563462c76316c606
> Reviewed-on: https://chromium-review.googlesource.com/c/1297481
> Reviewed-by: Alexis Hétu <sugoi@chromium.org>
> Reviewed-by: Greg Kerr <kerrnel@chromium.org>
> Reviewed-by: Robert Sesek <rsesek@chromium.org>
> Commit-Queue: Zhenyao Mo <zmo@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#602391}

TBR=sugoi@chromium.org,zmo@chromium.org,kbr@chromium.org,kerrnel@chromium.org,rsesek@chromium.org

Change-Id: Ib9ab22645f1727249db8f3f9a007cc76402e6067
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 897914
Reviewed-on: https://chromium-review.googlesource.com/c/1298419Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Zhenyao Mo <zmo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#602457}