Roll Skia from e4f36d7ac8f5 to ed15b1c39b8b (1 revision) (flutter#19687)

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': 'e4f36d7ac8f5dc6f5157616149f0eff3877808b4',
+  'skia_revision': 'ed15b1c39b8be9bf60197baf7819602aacd06679',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the