Revert of Roll ANGLE 4a69356..2f29d78 (patchset #1 id:1 of https://codereview.chromium.org/1342123002/ )
Revert of Roll ANGLE 4a69356..2f29d78 (patchset #1 id:1 of https://codereview.chromium.org/1342123002/ )

Reason for revert:
Contain changes that broke the GN build.

Original issue's description:
> Roll ANGLE 4a69356..2f29d78
>
> https://chromium.googlesource.com/angle/angle.git/+log/4a69356..2f29d78
>
> BUG=
>
> TEST=bots
>
> Committed: https://crrev.com/b2bc4ee0c22669750b716351801c72ea5345c8e4
> Cr-Commit-Position: refs/heads/master@{#348908}

TBR=geofflang@chromium.org,cwallez@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1344853005

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#348917}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk