Roll Skia from 3913d3e to 7b46300 (4 revisions)

https://skia.googlesource.com/skia.git/+log/3913d3e137ed..7b46300fe4ff

2020-09-01 johnstiles@google.com Move ownership of SkSL::Inliner to SkSL::Compiler.
2020-09-01 johnstiles@google.com Replace salting process in SkSLInliner with a symbol table check.
2020-09-01 johnstiles@google.com Update contains_xxxx_break to use ProgramVisitor.
2020-09-01 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ANGLE from 2f291c0 to c0dda02 (11 revisions)

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 michaelludwig@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/+doc/master/autoroll/README.md

Author: skia-flutter-autoroll

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': '3913d3e137edda87872d4f7002ed6dc97c6faf26',
+  'skia_revision': '7b46300fe4ff4603c269093601e2779e36f71c88',
 
   # 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: 074a50d9184c881a766997db171b02d1
+Signature: e4f04fc4e1dcf7083e8c8bc797fc7fe4
 
 UNUSED LICENSES: