Roll Skia from 76e45134b8a7 to b393c4bccd5f (1 revision) (#27067)

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': '76e45134b8a797c0da4b4f998442e3ce3c29cf44',
+  'skia_revision': 'b393c4bccd5f096339ed8da2d71c687d445e739f',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the