Roll src/third_party/skia 347d36586cb6..325778b8884b (7 commits) (flutter/engine#7552)

https://skia.googlesource.com/skia.git/%2Blog/347d36586cb6..325778b8884b

git log 347d36586cb6c464993a0f43d7a8e74cd9e56822..325778b8884bac8d6811e1fbaf05594288ecebcd --date=short --no-merges --format=%ad %ae %s
2019-01-22 benjaminwagner@google.com Update android-skqp Docker image to accept licenses
2019-01-22 csmartdalton@google.com Move Op chain bounds calculations into tryConcat
2019-01-22 reed@google.com Move more utils into SkFontPriv, IWYU
2019-01-22 fmalita@chromium.org [skshaper] Relax create_hb_font assert
2019-01-22 brianosman@google.com Update ImGui to 1.67
2019-01-22 ethannicholas@google.com Revert "Reland "fixed VK geometry shaders""
2019-01-22 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src 9eca44242f7b..2d4f839f26f7 (254 commits)

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 (djsollen@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': '347d36586cb6c464993a0f43d7a8e74cd9e56822',
+  'skia_revision': '325778b8884bac8d6811e1fbaf05594288ecebcd',
 
   # 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: 5b8ee1e6fa4f1b99d825b0ed8efe4896
+Signature: 45190f961bd2a9e1e52db5a1f2ec5cfc
 
 UNUSED LICENSES: