Roll Skia from 107114dd1d6e to a7f69c290667 (18 revisions) (#21666)

https://skia.googlesource.com/skia.git/+log/107114dd1d6e..a7f69c290667

*** Force-landing this with red checks so we don't fall too far behind. (All failures are flakes).

2020-10-07 egdaniel@google.com Add stencil formats to all the backends.
2020-10-07 brianosman@google.com Only include one variable per declaration statement
2020-10-07 johnstiles@google.com Remove accidentally repeated bit-index expression.
2020-10-07 mtklein@google.com refactor HashAndEncode
2020-10-07 robertphillips@google.com Centralize CreateLazyView helper in GrThreadSafeUniquelyKeyedProxyViewCache
2020-10-07 michaelludwig@google.com Update AutoLayerForImageFilter to use SkTCopyOnFirstWrite
2020-10-07 johnstiles@google.com Rename ChunkBits to kChunkBits.
2020-10-07 jvanverth@google.com Revert "Add a 2d cross product intrinsic to sksl"
2020-10-07 robertphillips@google.com Add customData capability to the thread-safe proxy cache ...
2020-10-07 johnstiles@google.com Fix data() method and add unit test.
2020-10-07 kjlubick@google.com [canvaskit] Add make rule to check types
2020-10-07 csmartdalton@google.com Add a 2d cross product intrinsic to sksl
2020-10-07 skia-autoroll@skia-public.iam.gserviceaccount.com Roll SwiftShader from afe6ca45b6da to 635de036d766 (3 revisions)
2020-10-07 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ANGLE from 77e3d0ae97b6 to 3df629c55d89 (20 revisions)
2020-10-07 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Chromium from 4259b6b6cb0f to 3c77521707c0 (463 revisions)
2020-10-07 skia-autoroll@skia-public.iam.gserviceaccount.com Roll Dawn from 326e14f34bb5 to 7e22b1c44fb0 (6 revisions)
2020-10-07 mtklein@google.com retry³ absl
2020-10-06 johnstiles@google.com Separate out SymbolTable aliases from regular Symbols.

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 jvanverth@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

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': '107114dd1d6ea25ebfb243e7046e33f15367579d',
+  'skia_revision': 'a7f69c290667bb969788e014e3308cef6e187740',
 
   # 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: bccba30d609a717c651fc7cde834d3d2
+Signature: d3107608da67165804061970476ba2d7
 
 UNUSED LICENSES:
 
@@ -796,7 +796,6 @@ FILE: ../../../third_party/skia/src/sksl/ir/SkSLType.h
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLTypeReference.h
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLUnresolvedFunction.h
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLVarDeclarations.h
-FILE: ../../../third_party/skia/src/sksl/ir/SkSLVarDeclarationsStatement.h
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLVariable.h
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLVariableReference.h
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLWhileStatement.h
@@ -4010,6 +4009,7 @@ FILE: ../../../third_party/skia/src/sksl/SkSLSPIRVtoHLSL.h
 FILE: ../../../third_party/skia/src/sksl/SkSLSampleUsage.cpp
 FILE: ../../../third_party/skia/src/sksl/SkSLTinyUnorderedMap.h
 FILE: ../../../third_party/skia/src/sksl/ir/SkSLInlineMarker.h
+FILE: ../../../third_party/skia/src/sksl/ir/SkSLSymbolAlias.h
 FILE: ../../../third_party/skia/src/utils/SkCustomTypeface.cpp
 ----------------------------------------------------------------------------------------------------
 Copyright 2020 Google LLC
@@ -6594,11 +6594,13 @@ TYPE: LicenseType.bsd
 FILE: ../../../third_party/skia/modules/canvaskit/canvaskit/example.html
 FILE: ../../../third_party/skia/modules/canvaskit/canvaskit/extra.html
 FILE: ../../../third_party/skia/modules/canvaskit/canvaskit/node.example.js
+FILE: ../../../third_party/skia/modules/canvaskit/canvaskit/package-lock.json
 FILE: ../../../third_party/skia/modules/canvaskit/canvaskit/package.json
 FILE: ../../../third_party/skia/modules/canvaskit/canvaskit/shaping.html
-FILE: ../../../third_party/skia/modules/canvaskit/canvaskit/types/bin/canvaskit.d.ts
 FILE: ../../../third_party/skia/modules/canvaskit/canvaskit/types/canvaskit-wasm-tests.ts
 FILE: ../../../third_party/skia/modules/canvaskit/canvaskit/types/index.d.ts
+FILE: ../../../third_party/skia/modules/canvaskit/canvaskit/types/tsconfig.json
+FILE: ../../../third_party/skia/modules/canvaskit/canvaskit/types/tslint.json
 FILE: ../../../third_party/skia/modules/canvaskit/canvaskit/viewer.html
 FILE: ../../../third_party/skia/modules/pathkit/npm-asmjs/example.html
 FILE: ../../../third_party/skia/modules/pathkit/npm-asmjs/package.json