Roll Skia from 84b0233bb38e to 997df84ac144 (5 revisions) (#24343)

https://skia.googlesource.com/skia.git/+log/84b0233bb38e..997df84ac144

2021-02-11 [email protected] Roll SwiftShader from 9677c6d28278 to 673a7fe5c3ff (5 revisions)
2021-02-11 [email protected] Remove dead code for - non-sampling-optionsd drawImage (and drawAtlas, etc.) - drawBitmap calls
2021-02-11 [email protected] add fast_mul(F32,F32)
2021-02-11 [email protected] Remove shims for reordering indirect draw command signatures
2021-02-10 [email protected] Disable caching of GrTextures in promise images.

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-flutter-autoroll
Please CC [email protected] on the revert to ensure that a human
is aware of the problem.

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/master/autoroll/README.md

Author: skia-flutter-autoroll

DEPS

@@ -27,7 +27,7 @@ vars = {
   'skia_git': 'https://skia.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': '84b0233bb38ef86b5726b75d3e45292034f69f2f',
+  'skia_revision': '997df84ac1441a0f8430f9027b8c8c3e78610999',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the

ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 9cdbb572b141946fe97d454c08c4f26e
+Signature: 5392b7d6b1d21c8b7f1c9e46eb516ed5
 
 UNUSED LICENSES: