Roll src/third_party/dart dcdc71d7639a..a90b84544426 (32 commits)

[skia-flutter-autoroll]

https://dart.googlesource.com/sdk.git/+log/dcdc71d7639a..a90b84544426

git log dcdc71d..a90b845 --date=short --first-parent --format='%ad %ae %s'
2020-04-08 rmacnak@google.com [infra] Fix AOT sanitizer bots to build everything they need.
2020-04-08 bkonyi@google.com Revert "[ Service / package:dds ] Add stream support to package:dds and enable DDS for VM service tests"
2020-04-08 nshahan@google.com [ddc] Add typeRep<T>() to inline an unwrapped type directly
2020-04-07 nshahan@google.com [ddc] Rename test so it actually runs as a test
2020-04-07 rnystrom@google.com Migrate language_2/export to NNBD.
2020-04-07 bkonyi@google.com [ Service / package:dds ] Add stream support to package:dds and enable DDS for VM service tests
2020-04-07 alexmarkov@google.com [vm/nnbd/tests] Fix service/process_service_test for dartkp-weak-asserts config
2020-04-07 rnystrom@google.com Migrate language_2/exception to NNBD.
2020-04-07 jwren@google.com Follow up on recent completion improvement in https://dart-review.googlesource.com/c/sdk/+/142545 to add a test in optype_test.dart
2020-04-07 jwren@google.com Suggest type names before names in FieldDeclarations, even when they are documented with dartdoc
2020-04-07 rileyporter@google.com [tests] Remove more deprecated List constructor usage in tests
2020-04-07 jcollins@google.com Add AnalysisServer client implementation for isolates.
2020-04-07 jwren@google.com Modify the completion_metrics.dart file to print the delta between the generated completions with and without useNewRelevance set
2020-04-07 paulberry@google.com Prepare to publish analyzer 0.39.6.
2020-04-07 regis@google.com [VM/nnbd] Verify that constants in core snapshots are mode agnostic.
2020-04-07 rmacnak@google.com [vm] Don't use addresses when naming type testing stubs.
2020-04-07 rnystrom@google.com Add a little script to run migrated (and unmigrated) tests.
2020-04-07 srujzs@google.com [dart:html] Change late finals to external getters
2020-04-07 paulberry@google.com Migration: remove the PotentialModification class and some of its descendants.
2020-04-07 paulberry@google.com Migration: distinguish inserted casts based on whether they are downcasts.
2020-04-07 paulberry@google.com Migration: fix listener setup for FixBuilder
2020-04-07 paulberry@google.com Migration: categorize changes shown in the preview tool.
2020-04-07 scheglov@google.com Improve DOWN for FutureOr vs. FutureOr or Future.
2020-04-07 scheglov@google.com Implement hasTypeParameterReference using RecursiveTypeVisitor.
2020-04-07 scheglov@google.com Remove disableConflictingGenericsCheck flag.
2020-04-07 jwren@google.com Suggest type names before names in TopLevelVariableDeclarations, even when they are documented with dartdoc.
2020-04-07 srawlins@google.com Format analyzer's mock SDK code
2020-04-07 ayanbanerjee7777@gmail.com [doc] Update dartlang.org links to dart.dev
2020-04-07 jwren@google.com Improve the completion of return types on FunctionTypedFormalParameters in FormalParameterLists
2020-04-07 srawlins@google.com Add Window and DocumentFragment to analyzer's mock SDK.
2020-04-07 rmacnak@google.com Reland "[vm, gc] Parallel scavenge."
2020-04-07 scheglov@google.com Fix LinterContext().canBeConst() - compute dependencies.

Created with:
gclient setdep -r src/third_party/dart@a90b84544426

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
Please CC dart-vm-team@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: dart-vm-team@google.com