Roll Skia from 3010f3d79193 to 5276ba274b38 (1 revision) (flutter#25859)

https://skia.googlesource.com/skia.git/+log/3010f3d79193..5276ba274b38

2021-04-30 [email protected] Add --reducedshaders to fm

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': '3010f3d791937a1ef6892a906077791cc236f0ec',
+  'skia_revision': '5276ba274b38826e3415326f08607bf6cdc08238',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the