Roll Skia from ae2171eba699 to 31df6806c06b (3 revisions) (#27830)

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': 'ae2171eba6991eab7a212d33bf8e1203aec6f860',
+  'skia_revision': '31df6806c06b2949769a128fc5c1da8408ad1d1e',
 
   # 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

-Signature: f1b1c5581e21b96c7e4665d7509dac1d
+Signature: d34bea5d8b6281442f16d18a3d6a6976
 
 UNUSED LICENSES: