This allows for targets to depend on the assets generated by the test_fixtures target.

Our tests depend on explicit latching to verify assertion are checked. If a test
does not respond for a long time, it has probably encoutered a deadlock. Instead
of waiting for the test runner to detect this, apply a very aggresive timeout on
a per test basis.

Co-authored-by: NDavid Worsham <arbreng@gmail.com>

* fix runtime type errors when running with canvaskit

Roll fuchsia/sdk/core/mac-amd64 from 6h3IH... to Ke00Y...

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/fuchsia-mac-sdk-flutter-engine
Please CC  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:
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Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

https://dart.googlesource.com/sdk.git/+log/c8ed304e979a..3414b5167554

git log c8ed304e979a..3414b5167554 --date=short --first-parent --format='%ad %ae %s'
2020-02-04 rnystrom@google.com Migrate language_2/assign to NNBD.
2020-02-04 sstrickl@google.com [vm/aot] Remove object wrapping of bare instructions for AOT snapshots.
2020-02-04 rnystrom@google.com Migrate language_2/accessor_conflict to NNBD.
2020-02-04 vegorov@google.com [runtime/docs] Add custom lexer for shell sessions in runtime wiki.
2020-02-04 vegorov@google.com [vm/docs] Publish "Introduction to Dart VM" source and build tools.
2020-02-04 jensj@google.com [observatory] Allow to say 'break package:foo/file.dart:42'
2020-02-04 jensj@google.com [vm] [debugger] Fix for not breaking in library with mixin
2020-02-04 kustermann@google.com [vm/concurrency] Disable isolate groups in AOT mode
2020-02-04 dmitryas@google.com [cfe] Account for signatures when inserting noSuchMethod forwarders
2020-02-04 johnniwinther@google.com [dart2js] Remove all unneeded casts
2020-02-04 srujzs@google.com Change nnbd_src files to be null-safe
2020-02-04 bkonyi@google.com [ VM / dart:typed_data ] Change fmaxf/fminf to fmax/fmin for Float64x2.clamp
2020-02-04 rmacnak@google.com Mark typed_data/zeroed_allocation_test as slow on reload bots.
2020-02-03 nshahan@google.com [dartdevc] Enforce omit_local_variable_types lint
2020-02-03 nshahan@google.com [tests] Create `null is T` tests in legacy and null safe libraries
2020-02-03 paulberry@google.com Migration: remove test file containing no tests
2020-02-03 srawlins@google.com Final fix for analyzer windows bots; don't canonicalize
2020-02-03 scheglov@google.com Remove TypeSystem.isOverrideSubtypeOf()
2020-02-03 scheglov@google.com Issue 40304. Use runtime type equality for checking overrides.
2020-02-03 jwren@google.com Standard output improvement from metrics_util.dart to print "<no counts>" if  the counter has no counts.
2020-02-03 bkonyi@google.com [ VM / typed_data ] Fixed inconsistent results for -Float32x4.zero().clamp and -Float64x2.zero().clamp
2020-02-03 scheglov@google.com Update dev_compiler/tool/dart2js_nnbd_sdk_error_golden.txt after analyzer change.
2020-02-03 jwren@google.com Completion metrics change- add missing documentation in the relevance_analyzers.dart file, as well as adding DartCompletionRequest as an input to the analyzers
2020-02-03 scheglov@google.com Use TypeSystemImpl instead of TypeProvider in DartObjectImpl.
2020-02-03 scheglov@google.com Use CorrectOverrideHelper in InheritanceManager3.
2020-02-03 alexmarkov@google.com [vm/nnbd] Use NNBD flags from AsExpression, IsExpression
2020-02-03 paulberry@google.com Migration: plumb ElementTypeProvider through FlowAnalysisVisitor.
2020-02-03 paulberry@google.com Migration: avoid ambiguities when adding a cast after a function expression.
2020-02-03 paulberry@google.com Migration: properly handle type parameter types with nullable bounds.
2020-02-03 scheglov@google.com Include types of candidates into INCONSISTENT_INHERITANCE.
2020-02-03 markzipan@google.com Cleaning up corelib test migrations.
2020-02-03 jwren@google.com For 'dartdev format' and 'dartdev format --help', return the output from dartfmt --help, instead of the default output from FormatCommand.printUsage(). This is follow up on https://dart-review.googlesource.com/c/sdk/+/133042
2020-02-03 rmacnak@google.com Reapply "[vm] Initialize large typed arrays only once."
2020-02-03 rmacnak@google.com [vm, gc] Remove BumpAllocationScope.
2020-02-03 rmacnak@google.com [vm, gc] Document safepointing.
2020-02-03 jcollins@google.com Implement FantasySubPackage.
2020-02-03 brianwilkerson@google.com Change the tests of quick fixes so they can use real lint results
2020-02-03 sortie@google.com [dart:io] Backport semantic changes from the dart:io NNBD migration.
2020-02-03 johnniwinther@google.com [cfe] Non-nullify legacy types in opt-in libraries
2020-02-03 johnniwinther@google.com [cfe] Rename LibraryBuilder.uri to importUri
2020-02-03 kustermann@google.com [vm] Specialize TTS stubs only for legacy types
2020-02-03 johnniwinther@google.com [cfe] Detects writes during initialization in late final field lowering
2020-02-03 johnniwinther@google.com Fix language/operator/invalid_operators_test
2020-02-03 dmitryas@google.com [cfe] Disallow non-nullable fields without initializers
2020-02-03 johnniwinther@google.com [cfe] Handle explicit extension operator access from dill.
2020-02-03 victor.agnez@hotmail.com [vm] Remove flag unbox_numeric_fields
2020-02-03 askesc@google.com [vm/aot] Use a global dispatch table for instance calls in AOT.
2020-02-03 askesc@google.com [vm] Share implementation of LoadClassIdInstr across architectures.
2020-02-03 devoncarew@google.com [nnbd tool] move nnbd preview tool resources to individual files
2020-02-02 scheglov@google.com Extract CorrectOverrideHelper and use for checking mixin applications.
2020-02-02 sigmund@google.com Fix type error within _EventStream.onData
2020-02-02 srawlins@google.com NNBD Preview: Fixes for a few edit details

Created with:
  gclient setdep -r src/third_party/dart@3414b5167554

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dart-sdk-flutter-engine
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To report a problem with the AutoRoller itself, please file a bug:
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Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

Bug: None
Tbr: dart-vm-team@google.com

There are two issues in the test as written:
* There is a race on the first check to dtor_task_queue_id which might be
  encountered if the calling thread is de-scheduled and the unref queue manages
  to collect the object before the end of the scope.
* Two threads were owning a shared object but we relied on the object to be
  collected on the unref queue.

Added API guards to flags in PlatformPlugin that were introduced after Flutter's min SDK version. (#13965)

Fixes a bug where deleteBackward was checking for being at the start of
the text before checking for a non-empty selection, breaking deletion
when the entire text field was selected.

Also removes an (incorrect) post-deletion position update that was
redundant with code in insertText:replacementRange:, and thus having no
effect.

Fixes https://github.com/flutter/flutter/issues/46150

 add compileExpressionToJs in frontend server in preparation for coming
  evaluation changes in the SDK

Investigation is being tracked in https://github.com/flutter/flutter/issues/50032.

https://dart.googlesource.com/sdk.git/+log/ed441e48d055..c8ed304e979a

git log ed441e48d055..c8ed304e979a --date=short --first-parent --format='%ad %ae %s'
2020-02-02 devoncarew@google.com [dartdev] add a dartdev 'create' command

Created with:
  gclient setdep -r src/third_party/dart@c8ed304e979a

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/dart-sdk-flutter-engine
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To report a problem with the AutoRoller itself, please file a bug:
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Documentation for the AutoRoller is here:
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Bug: None
Tbr: dart-vm-team@google.com

Roll fuchsia/sdk/core/mac-amd64 from jtwQF... to 6h3IH...

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/fuchsia-mac-sdk-flutter-engine
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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

https://skia.googlesource.com/skia.git/+log/5d92ae2b56df..3d05192abedf

git log 5d92ae2b56df..3d05192abedf --date=short --first-parent --format='%ad %ae %s'
2020-02-01 herb@google.com Simplify subrun atlas generation tracking

Created with:
  gclient setdep -r src/third_party/skia@3d05192abedf

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
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To report a problem with the AutoRoller itself, please file a bug:
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Documentation for the AutoRoller is here:
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Bug: None
Tbr: reed@google.com

https://skia.googlesource.com/skia.git/+log/776293dceefd..5d92ae2b56df

git log 776293dceefd..5d92ae2b56df --date=short --first-parent --format='%ad %ae %s'
2020-02-01 brianosman@google.com Implement constantOutputForConstantInput in GrColorSpaceXformEffect

Created with:
  gclient setdep -r src/third_party/skia@5d92ae2b56df

If this roll has caused a breakage, revert this CL and stop the roller
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Bug: None
Tbr: reed@google.com

https://skia.googlesource.com/skia.git/+log/1b80c357926b..776293dceefd

git log 1b80c357926b..776293dceefd --date=short --first-parent --format='%ad %ae %s'
2020-02-01 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update Go Deps
2020-02-01 agrieve@chromium.org Add missing "const" to SkMD5::finish::PADDING

Created with:
  gclient setdep -r src/third_party/skia@776293dceefd

If this roll has caused a breakage, revert this CL and stop the roller
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Bug: None
Tbr: reed@google.com

This reverts commit 4a55b4fd.

Roll fuchsia/sdk/core/mac-amd64 from x6sVj... to jtwQF...

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
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https://dart.googlesource.com/sdk.git/+log/91a3ea89c8e4..ed441e48d055

git log 91a3ea89c8e4..ed441e48d055 --date=short --first-parent --format='%ad %ae %s'
2020-02-01 fishythefish@google.com Update all Slow tests to be Slow, Pass.
2020-01-31 srawlins@google.com Fix another windows test in analyzer
2020-01-31 sigmund@google.com fix dart2js golden file.
2020-01-31 liama@google.com [vm] Stop storing to temp in LoadLateField

Created with:
  gclient setdep -r src/third_party/dart@ed441e48d055

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
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Documentation for the AutoRoller is here:
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Bug: None
Tbr: dart-vm-team@google.com

This was only necessary when the Engine had to build in multiple buildroots
where the sources where checked out at different paths relative to the
buildroot. This is no longer the case and there are already cases GN rules
have been written that mix and match variable usage with the direct
specification of the path to the Flutter sources relative to the sole buildroot.

https://skia.googlesource.com/skia.git/+log/4513cdde4912..1b80c357926b

git log 4513cdde4912..1b80c357926b --date=short --first-parent --format='%ad %ae %s'
2020-01-31 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).

Created with:
  gclient setdep -r src/third_party/skia@1b80c357926b

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 reed@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:
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Documentation for the AutoRoller is here:
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Bug: None
Tbr: reed@google.com

https://dart.googlesource.com/sdk.git/+log/5ae5aff6406a..91a3ea89c8e4

git log 5ae5aff6406a..91a3ea89c8e4 --date=short --first-parent --format='%ad %ae %s'
2020-01-31 zichangguo@google.com Revert "[dart:io] Stop forcing lower case on HttpHeaders"
2020-01-31 jcollins@google.com Add path parsing to pub support.
2020-01-31 srawlins@google.com Load navigation programatically; use badges for edit counts; #40115
2020-01-31 kustermann@google.com [vm/compiler] Mark Box instructions as non-speculative (since the inputs are always unboxed values and dont need to be checked)
2020-01-31 vsm@google.com [dartdevc/nnbd] enable co19_2 tests for legacy mode
2020-01-31 jwren@google.com Initial RelevanceAnalyzer support in the completion_metrics.dart algorithm with an initial example implementation of RHSOfAsExpression
2020-01-31 kustermann@google.com [vm] Set Class::is_const() based on final fields instead of generative constructors (which can be shaken by TFA)
2020-01-31 sigmund@google.com Update check_nnbd_sdk to diff expectations directly in dart.
2020-01-31 vsm@google.com [dartdevc] use var for top-level
2020-01-31 fishythefish@google.com [dart2js] Use flags to choose between legacy/NNBD in RTI.
2020-01-31 nshahan@google.com [dartdevc] Add dart:io back to the sdk
2020-01-31 johnniwinther@google.com [cfe] Add new flags to AsExpression and IsExpression
2020-01-31 scheglov@google.com Check for correct overrides as the specification requires.
2020-01-31 sigmund@google.com Fix based64 decoder.
2020-01-31 fishythefish@google.com [dart2js] Update generic function subtyping.
2020-01-31 srawlins@google.com NNBD preview: Add 'view' links to Edit List; #40115
2020-01-31 brianwilkerson@google.com Enable always_declare_return_types in analysis_server
2020-01-31 brianwilkerson@google.com Enable empty_catches in analysis_server
2020-01-31 brianwilkerson@google.com Improve the fix for empty_catch
2020-01-31 zichangguo@google.com [dart:io] Stop forcing lower case on HttpHeaders
2020-01-31 zichangguo@google.com [vm] seperate error and unknown types for getStdioHandletype
2020-01-31 kustermann@google.com [vm/reload] Fix crash in scavneger / GC after reload on ia32

Created with:
  gclient setdep -r src/third_party/dart@91a3ea89c8e4

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
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Documentation for the AutoRoller is here:
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Bug: None
Tbr: dart-vm-team@google.com

FlutterView#enableTransparentBackground has been deprecated for some
time now since it breaks a11y highlighting in most cases. When the
warning was first added there was no known workaround, but now the v2
embedding is in stable and ready to support this usecase. Update the
warning to point to the v2 embedding.

https://skia.googlesource.com/skia.git/+log/0ee16f689843..4513cdde4912

git log 0ee16f689843..4513cdde4912 --date=short --first-parent --format='%ad %ae %s'
2020-01-31 herb@google.com Rename flush -> issueDrawMaybeInlineUpload
2020-01-31 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2020-01-31 mtklein@google.com let's try to fix nullptr + k
2020-01-31 robertphillips@google.com Minor GM cleanup
2020-01-31 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2020-01-31 drott@chromium.org Remove CGFontRef parameter from SkMakeTypefaceFromCTFont
2020-01-31 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2020-01-31 jvanverth@google.com Enable async MTLLibrary and MTLRenderPipelineState creation.
2020-01-31 jlavrova@google.com Small fix: ignore empty unresolved blocks to avoid (unnecessary) ASSERT later
2020-01-31 recipe-mega-autoroller@chops-service-accounts.iam.gserviceaccount.com Roll recipe dependencies (trivial).
2020-01-31 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update Go Deps
2020-01-31 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 ee07cb317579..e196bc85ac2d (3 commits)
2020-01-31 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader 430def835f9f..79b36b640692 (6 commits)

Created with:
  gclient setdep -r src/third_party/skia@4513cdde4912

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
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To report a problem with the AutoRoller itself, please file a bug:
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Documentation for the AutoRoller is here:
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Bug: None
Tbr: reed@google.com

Also update all known test harnesses to use this and fixes the broken shell_unittests harness.

Fixes https://github.com/flutter/flutter/issues/49853