Roll src/third_party/skia 04580795746b..4d557e3df433 (4 commits) (#10794)

https://skia.googlesource.com/skia.git/+log/04580795746b..4d557e3df433

git log 04580795746b..4d557e3df433 --date=short --no-merges --format='%ad %ae %s'
2019-08-08 robertphillips@google.com Revert "Fix exactify for explicit resource allocation"
2019-08-08 robertphillips@google.com Fix exactify for explicit resource allocation
2019-08-08 bsalomon@google.com fix skip-rectangle-texture-support in GrGLGpu::onWrapBackendTextureAsRenderTarget
2019-08-08 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).

Created with:
  gclient setdep -r src/third_party/skia@4d557e3df433

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, who should
be CC'd on the roll, and stop the roller if necessary.


Bug: None
TBR=reed@google.com

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': '04580795746b095a005eadefadcb48a7fc1651da',
+  'skia_revision': '4d557e3df433400b55373b684123920b03f2f728',
 
   # 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: db6253ae92ac5535be76ee7646db4827
+Signature: af9aabb6402095646c771cddc00900c1
 
 UNUSED LICENSES: