Roll Dart to version 808ed6238b9262660e31ea826f7aea6cfa3a3493 (#6354)

Includes the following changes:
808ed6238b [vm, compiler] Make register allocator instead of assembler put the write barrier value into a fixed register.
2f25dcda16 [vm] Remove script snapshots.
5d10974a89 [vm/bytecode] Use _simpleInstanceOf for certain 'is' checks in bytecode
9cc251c78b [vm/test] Fix process_stderr_test.
0f5968945c [vm/aot] Do not tree shake type arguments used in constant instances
99daccc0dd Handle FunctionExpressionInvocation when creating summaries.
d673847bd8 [dartdevc] add --kernel option, deprecate bin/dartdevk
79d639a3a8 [VM interpreter/bytecode] Modify argument order for AssertAssignable bytecode.
9fb3ff1f1a Extract InheritanceManager2.
d9fb4b03a6 [vm/compiler] Fix recent regressions due to inaccurate type merging
dcad8fe895 In analyzer/FE comparison, compare the return types of function types.
3c4c62d79a Reland "[VM] Dart_Initialize no longer crashes after Dart_Cleanup"
e31f9fc55f Track front end errors.
15c64b4b77 [vm/aot] Remove 'rounds' from precompiler
e7d71bedf5 [toolchain] Update Windows VS toolchain to current Chromium one.
0262530e1f Clarify code that checks for analyzer/FE differences.
5940ba21d2 [benchmark] Add gen_kernel_bytecode.dill to try_benchmarks.sh
bbfd4025c3 Fix copyright date in new test
4dcd8392fc Allow super invocations find members in supertypes of old style mixins.
a0ff5f8b3f Add stub implementation for analysis server edit.dartfix
0808d29b4e Update spec of potentially constant and compile-time constant expressions.
d8c32ae010 [vm] Add a reload test that checks that types are finalized.
cf055d6b88 [vm] Fix isolate reload tests so that they can pass kernel files for isolate reload.
429bca8e65 Make `Uri.parse` accept `[` and `]` in path, query and fragment.
b01f461280 Add product mode macos dart executable to fileset for running tests
e05f1fc32d Adjusted superclasses to make a mixin application superclass abstract
b480089a1a Fix updateExpectations in expression test
4816b607a5 Eliminate checked mode and production mode
c22b2efb48 Verify that mixin constraints can't be satisfied by the application (or named class) itself.
98a9adf696 Make constructor function types conform with the specification.
a3aa0c18fb Improve messages involving empty cycles
48d1b5e64b Improve diagnostics with anonymous jump targets
c38eab4fa9 [infra] Remove Dart 1 builders from the CQ (Part II)
e17a5965d1 [gardening] Update product dartk test status.
efe76b272d [gardening] Update product dartk test status.
1a29217509 Remove empty statements
1c8d65c49b fix #32785, implement typedef equality in dartdevc
20fa7815f0 Add @pragma('dart2js:noInline') and @pragma('dart2js:tryInline')
b1a54154f8 Check that implicit type arguments satisfy bounds.
3b511b9439 [dartdevc] improve compile time of kernel backend
c7383b5caf Revert "[VM runtime] Store Smi instance type in type test cache when using the interpreter."
d1a3eaaa99 Add flag to control symbol visibility of libdart
86430cb46a [vm] Extend AppJIT capability of gen_snapshot.
f81709c3e3 [vm/aot] Use field types inferred in TFA and remove inference in precompiler.cc
e7fc155457 [gardening] Adjust product kernel test status
b3b947d9a6 bump to linter 0.1.64
c9bcfe877b [vm] Fix byte displacement printing in x86 disassembler
ded73cdd08 Revert "[dart2js] Simplify noInline / tryInline annotations"
2c82a400e8 Signal a static error when invoking a non-function (issue 34320)
34425a870e [vm] Set implicit function accessor when the functions are created
8bae3a1cfd [dart2js] Simplify noInline / tryInline annotations
8ff692acf4 [infra] Remove Dart 1 builders from the CQ (Part I)
9185294e7a Reland: Implement inheritance/override checks from the spec.
c23a9815ec Stop setting element model supertypes in TypeResolverVisitor when using new driver.
17b3310400 Resolve bounds for type parameters of generic type alias.
c624f8b0a9 First cut dartfix protocol

DEPS

@@ -31,8 +31,10 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/master/DEPS.
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': '4cf2d3990bac1f1df2f524899e1560a3683f3133',
+  'dart_revision': '808ed6238b9262660e31ea826f7aea6cfa3a3493',
 
+  # WARNING: DO NOT EDIT MANUALLY
+  # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
   'dart_args_tag': '1.4.4',
   'dart_async_tag': '2.0.8',
   'dart_bazel_worker_tag': '0.1.14',
@@ -58,7 +60,7 @@ vars = {
   'dart_http_throttle_tag': '1.0.2',
   'dart_intl_tag': '0.15.6',
   'dart_json_rpc_2_tag': '2.0.9',
-  'dart_linter_tag': '0.1.63',
+  'dart_linter_tag': '0.1.64',
   'dart_logging_tag': '0.11.3+2',
   'dart_markdown_tag': '2.0.2',
   'dart_matcher_tag': '0.12.3',

ci/licenses_golden/licenses_third_party

-Signature: 55639f553e457f899c0862a7c92d7676
+Signature: 298a107bb55f276ac38852045377a801
 
 UNUSED LICENSES: