[Autoroller] Roll Skia->Flutter back to the master branch

Change-Id: Ie83fae76c24f096526b6b2ff0c97634a0a897705
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/c/176320
Reviewed-by: Ravi Mistry <rmistry@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
diff --git a/autoroll/config/skia-flutter.json b/autoroll/config/skia-flutter.json
index 372af45..5cb3967 100644
--- a/autoroll/config/skia-flutter.json
+++ b/autoroll/config/skia-flutter.json
@@ -21,7 +21,7 @@
   "githubDEPSRepoManager": {
     "childBranch": "master",
     "childPath": "src/third_party/skia",
-    "parentBranch": "skia-master",
+    "parentBranch": "master",
     "preUploadSteps": [
       "FlutterLicenseScripts"
     ],