Roll ANGLE from 98a492209070 to 647026fa49c2 (3 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/98a492209070..647026fa49c2

2021-11-20 ynovikov@chromium.org Reland "Fix unused variable "useSwiftShader""
2021-11-20 ynovikov@chromium.org Revert "Fix unused variable "useSwiftShader""
2021-11-20 ynovikov@chromium.org Fix unused variable "useSwiftShader"

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/angle-dawn-autoroll
Please CC bajones@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in ANGLE: https://bugs.chromium.org/p/angleproject/issues/entry
To file a bug in Dawn: https://bugs.chromium.org/p/dawn/issues/entry

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Bug: None
Tbr: bajones@google.com
Change-Id: Ie43ff72cd0f7552257522dbc57f0d9379aad97b9
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/70421
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index f5d5a6c..06ad1bf 100644
--- a/DEPS
+++ b/DEPS
@@ -121,7 +121,7 @@
   },
 
   'third_party/angle': {
-    'url': '{chromium_git}/angle/angle@98a492209070feb0fde9db8166f3caffd7949dee',
+    'url': '{chromium_git}/angle/angle@647026fa49c2ac4c4db29660eb9ac9aa8a3dd926',
     'condition': 'dawn_standalone',
   },