Roll src/third_party/skia cb1adb40d0f3..bb74990a11d9 (3 commits) (flutter/engine#9261)

https://skia.googlesource.com/skia.git
/%2Blog/cb1adb40d0f3..bb74990a11d9

git log cb1adb40d0f310c6edac6c4afbede5acd0388b59..bb74990a11d91ebe0ff474107c6dae3c0aadf308 --date=short --no-merges --format=%ad %ae %s
2019-06-10 robertphillips@google.com Add P016 and P010 examples to wacky_yuv_formats GM
2019-06-10 ethannicholas@google.com SkSL vector divide by zero now properly reports an error
2019-06-10 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff (herb@google.com), and stop
the roller if necessary.

DEPS

@@ -23,7 +23,7 @@ vars = {
   'fuchsia_git': 'https://fuchsia.googlesource.com',
   'github_git': 'https://github.com',
   'skia_git': 'https://skia.googlesource.com',
-  'skia_revision': 'cb1adb40d0f310c6edac6c4afbede5acd0388b59',
+  'skia_revision': 'bb74990a11d91ebe0ff474107c6dae3c0aadf308',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the

engine/src/flutter/ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: e690fca41a3138b5acff0450e2ff6744
+Signature: a359872cbae8f94052ebc31427bccb3f
 
 UNUSED LICENSES: