Roll src/third_party/dart d5650235a249..2bf325900586 (35 commits)

[skia-flutter-autoroll]

Roll src/third_party/dart d565023..2bf3259 (35 commits)

https://dart.googlesource.com/sdk.git/+log/d5650235a249..2bf325900586

git log d565023..2bf3259 --date=short --first-parent --format='%ad %ae %s'
2020-05-13 rnystrom@google.com Migrate language_2/generic to NNBD.
2020-05-13 srujzs@google.com [dart:html] Label Navigator.deviceMemory as nullable
2020-05-12 scheglov@google.com Update ReturnTypeVerifier to be what the spec says.
2020-05-12 srawlins@google.com analyzer: Remove unused imports
2020-05-12 joshualitt@google.com [dart2js] Fix cfe_constant_evaluation_test for nnbd.
2020-05-12 bkonyi@google.com [ VM / DartDev ] Updated build rules for DartDev and exposed create_platform_sdk build target
2020-05-12 nshahan@google.com [ddc] Run co19 nnbd tests in weak mode
2020-05-12 aam@google.com [vm] Fix typo in calculation of native wrapper class size in precompiler configuration.
2020-05-12 paulberry@google.com Revert recent parser fixes
2020-05-12 rmacnak@google.com [vm] Fix various UBSan failures: AOT.
2020-05-12 bkonyi@google.com [ VM / DartDev ] Run all debugging sessions via 'dart run'
2020-05-12 nshahan@google.com [ddc] Output a metadata file for debugger
2020-05-12 scheglov@google.com Ensure that URIs end with '/', fixes empty 'packageUri'.
2020-05-12 rmacnak@google.com [vm] Fix various UBSan failures: ARM.
2020-05-12 bkonyi@google.com [ package:vm_service ] Fix issue where invoking a service extension with no arguments would result in a TypeError during message routing.
2020-05-12 bkonyi@google.com [ VM / Service ] Added TimelineStreamSubscriptionsChanged event
2020-05-12 alexmarkov@google.com Bump ABI version after a breaking change
2020-05-12 kevmoo@google.com Remove references to removed tools/gardening
2020-05-12 sra@google.com [dart2js] Specialize strong 'is Object'
2020-05-12 paulberry@google.com Migration: exclude "never" node from "why not nullable" traces
2020-05-12 rmacnak@google.com [vm] Fix LSAN when used without ASAN.
2020-05-12 askesc@google.com Write UTF-8 decoded characters directly into the result strings.
2020-05-12 askesc@google.com [vm] Add _allocate and _setAt methods to _TwoByteString.
2020-05-12 joshualitt@google.com [dart2js] Remove obsolete unittests.
2020-05-12 scheglov@google.com Create updated ParameterElement(s) using replace().
2020-05-12 srujzs@google.com [dart:html] Unsuppress MediaDevices.getUserMedia
2020-05-12 brianwilkerson@google.com Move an extension into the common place for extensions
2020-05-12 paulberry@google.com Migration: verify that the preview server doesn't leak information from outside the project
2020-05-12 paulberry@google.com Migration: fix rerunning migration tool after adding/removing files
2020-05-12 paulberry@google.com Migration: add rerun support to new CLI
2020-05-12 eernst@google.com New test, based on language PR #940 about ==.
2020-05-12 davidmorgan@google.com Update package_config to 9c586d04bd26fef01215fd10e7ab96a3050cfa64 for unused import fix.
2020-05-12 sgrekhov@unipro.ru [co19] Re-enable tests skipped due to breaking change #40674
2020-05-12 dmitryas@google.com [cfe] Update inference for redirecting factory constructors
2020-05-12 srawlins@google.com Migrator: Only print text about --apply-changes conditionally

Created with:
gclient setdep -r src/third_party/dart@2bf325900586

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.

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