Roll src/third_party/skia 77743492418e..c2dc9c864844 (22 commits) (#11872)

https://skia.googlesource.com/skia.git/+log/77743492418e..c2dc9c864844

git log 77743492418e..c2dc9c864844 --date=short --no-merges --format='%ad %ae %s'
2019-09-04 halcanary@google.com experimental/minimal_ios_mtl_skia_app
2019-09-04 fmalita@chromium.org [svgcanvas] Refactor clipping
2019-09-04 halcanary@google.com gn: try again to fix fuchsia
2019-09-04 fmalita@chromium.org [sksg] Fix mask/context overrides interaction
2019-09-04 halcanary@google.com gn: try to fix flutter roll
2019-09-04 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update Go deps
2019-09-04 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 31b524cf60b7..a1bf69967a32 (8 commits)
2019-09-04 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 920100cd4246..fbc146e97f30 (6 commits)
2019-09-04 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src 050ceed1f1d7..248662b1b84a (455 commits)
2019-09-04 bungeman@google.com [pdf] Disable default width calculation.
2019-09-03 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-09-03 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-09-03 brianosman@google.com Move SkSL caching out of GR_TEST_UTILS, trim persistent cache options
2019-09-03 reed@google.com update gm to better show the unclipped layers
2019-09-03 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2019-09-03 jvanverth@google.com Fix argument path for dsymutil
2019-09-03 brianosman@google.com Remove GrGLProgram cache stats, remove spurious declarations/includes
2019-09-03 halcanary@google.com gn: move all skia_* declare_args to skia.gni
2019-09-03 egdaniel@google.com Track all sampled textures in GrOpsTask and pass them to GrOpsRenderPass.
2019-09-03 bungeman@google.com [pdf] Only compute needed advances.
2019-09-03 kjlubick@google.com [canvaskit] Add rrect support
2019-09-03 reed@google.com update test to allow dumping images

Created with:
  gclient setdep -r src/third_party/skia@c2dc9c864844

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-flutter-autoroll
Please CC jlavrova@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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

Bug: None
TBR=jlavrova@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': '77743492418e9ac19c0c265c162a12d216619e29',
+  'skia_revision': 'c2dc9c864844a81736bff3d7a85570be0379706a',
 
   # 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: 27dd5baf50a36c87b458e369ccb7e0df
+Signature: 0e8986224b085e05bdc912bbf2fc7a76
 
 UNUSED LICENSES:
 
@@ -4842,6 +4842,7 @@ FILE: ../../../third_party/skia/docs/examples/Text_Size.cpp
 FILE: ../../../third_party/skia/docs/examples/Text_Skew_X.cpp
 FILE: ../../../third_party/skia/docs/examples/Typeface_Methods.cpp
 FILE: ../../../third_party/skia/docs/examples/Xor.cpp
+FILE: ../../../third_party/skia/experimental/minimal_ios_mtl_skia_app/main.mm
 FILE: ../../../third_party/skia/experimental/xform/SkShape.cpp
 FILE: ../../../third_party/skia/experimental/xform/SkShape.h
 FILE: ../../../third_party/skia/experimental/xform/SkXform.cpp