Roll Skia from 7585a65ac709 to dffd20efe95c (14 revisions) (flutter#22250)

Author: skia-flutter-autoroll

DEPS

@@ -26,7 +26,7 @@ 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': '7585a65ac709b5ec9d216e0dbb4ff46850711e93',
+  'skia_revision': 'dffd20efe95cfa6c4d928c9091c99825ab7b4a3c',
 
   # 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: 54fa1c0b3e7ecf3027410c47231cc116
+Signature: 801073172844be73f22cf6570c46d92b
 
 UNUSED LICENSES:
 
@@ -1349,7 +1349,6 @@ FILE: ../../../third_party/skia/modules/canvaskit/release.js
 FILE: ../../../third_party/skia/modules/canvaskit/rt_shader.js
 FILE: ../../../third_party/skia/modules/canvaskit/skottie.js
 FILE: ../../../third_party/skia/modules/canvaskit/skp.js
-FILE: ../../../third_party/skia/modules/canvaskit/wasm_tools/gmtests.html
 FILE: ../../../third_party/skia/modules/canvaskit/wasm_tools/viewer.html
 FILE: ../../../third_party/skia/modules/pathkit/chaining.js
 FILE: ../../../third_party/skia/modules/pathkit/externs.js