Roll src/third_party/skia 176b214f91bc..d04aaa3a841a (7 commits) (flutter#9105)

https://skia.googlesource.com/skia.git
/%2Blog/176b214f91bc..d04aaa3a841a

git log 176b214f91bc1ce302621f5796bfd7a72d5b3f5d..d04aaa3a841abd570f21b1780f2ae65dc1d1ebac --date=short --no-merges --format=%ad %ae %s
2019-05-28 halcanary@google.com PDF example
2019-05-28 michaelludwig@google.com Reland &flutter#34;Update GrRTC to use GrFillRectOp::MakeGeneric&flutter#34;
2019-05-28 halcanary@google.com experimental/editor: minor change
2019-05-22 herb@google.com Call bulk advances in SkPDFMakeCIDGlyphWidthsArray
2019-05-28 robertphillips@google.com Use sk_memset* in GrFillBufferWithColor
2019-05-28 skia-autoroll@skia-public.iam.gserviceaccount.com Roll skia/third_party/skcms feba95f66c08..ca5b4470be98 (1 commits)
2019-05-28 skia-autoroll@skia-public.iam.gserviceaccount.com Roll skia/third_party/skcms 5b8149aaf52b..feba95f66c08 (1 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 (kjlubick@google.com), and stop
the roller if necessary.

Author: skia-flutter-autoroll

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': '176b214f91bc1ce302621f5796bfd7a72d5b3f5d',
+  'skia_revision': 'd04aaa3a841abd570f21b1780f2ae65dc1d1ebac',
 
   # 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

@@ -1,4 +1,4 @@
-Signature: 1401d4a0d1ee0eed40328f985581b6c1
+Signature: 3347012bdd8faeba39c93f1efb49115a
 
 UNUSED LICENSES:
 
@@ -4733,6 +4733,7 @@ FILE: ../../../third_party/skia/docs/examples/Miter_Limit.cpp
 FILE: ../../../third_party/skia/docs/examples/Modulate.cpp
 FILE: ../../../third_party/skia/docs/examples/Multiply.cpp
 FILE: ../../../third_party/skia/docs/examples/Overlay.cpp
+FILE: ../../../third_party/skia/docs/examples/PDF.cpp
 FILE: ../../../third_party/skia/docs/examples/Paint_053.cpp
 FILE: ../../../third_party/skia/docs/examples/Paint_057.cpp
 FILE: ../../../third_party/skia/docs/examples/Paint_containsText.cpp