Roll src/third_party/dart e4c39721c473..0299903f3e78 (31 commits)

[skia-flutter-autoroll]

https://dart.googlesource.com/sdk.git/+log/e4c39721c473..0299903f3e78

git log e4c3972..0299903 --date=short --first-parent --format='%ad %ae %s'
2020-02-12 [email protected] [nnbd preview] restore navigation in the code editor
2020-02-12 [email protected] [vm/nnbd] Enable type testing stubs in NNBD weak mode
2020-02-12 [email protected] Revert "[vm] Aggressive write-barrier elimination."
2020-02-12 [email protected] Test that function types use mutual subtyping for type parameter bounds.
2020-02-12 [email protected] Skip test step "check nnbd sdk" on Windows.
2020-02-11 [email protected] Turn on first set of legacy testing for the VM NNBD bots. This turns on lib_2, corelib_2m language_2 and ffi_2
2020-02-11 [email protected] Gather more code completion metrics
2020-02-11 [email protected] [dart2js] migrate dart:isolate patch
2020-02-11 [email protected] Support for --default-language-version flag in analyzer_cli.
2020-02-11 [email protected] [VM/nnbd] Add nullable Object type to object store and use it.
2020-02-11 [email protected] Add separate libraries.json file to help migrate dart2js libraries.
2020-02-11 [email protected] [vm] Aggressive write-barrier elimination.
2020-02-11 [email protected] [tests] Add tests for generic function type bounds with null safety
2020-02-11 [email protected] [vm/concurrency] Add locking to ApiState as preparation for multiple isolates using the same api state
2020-02-11 [email protected] Pass a "--default-language-version" flag to analyzer for legacy tests.
2020-02-11 [email protected] Fix nullability for some templates
2020-02-11 [email protected] Update DEPS file for coming HttpHeaders change
2020-02-11 [email protected] [vm/concurrency] Extract common code from Thread::{Enter,Exit}{Isolate,IsolateHelper} into Thread::FinishEntering/PrepareLeaving
2020-02-11 [email protected] Replace AnalysisOptions.enabledExperiments with contextFeatures.
2020-02-11 [email protected] Implement analysis options modification.
2020-02-11 [email protected] Remove the old relevance analyzer
2020-02-11 [email protected] [isolate/nnbd] fix nnbd errors in dart:isolate
2020-02-11 [email protected] convert all paths
2020-02-11 [email protected] Remove @required from AnalysisDriver packages parameter.
2020-02-11 [email protected] An initial attempt to gather metrics to guide ranking of suggestions
2020-02-11 [email protected] [lib] Add null check of types back into _Invocation.method
2020-02-11 [email protected] filtering on kinds; relevance boosting
2020-02-11 [email protected] Reland "Implementation of evaluation to JS in frontend server"
2020-02-11 [email protected] Issue 40546. Fix getSourceKind() for files that are from external summaries.
2020-02-11 [email protected] [nnbd/corelib] Restore null test in Stream.asyncExpand
2020-02-11 [email protected] Add context messages for cases where different types have the same name

Created with:
gclient setdep -r src/third_party/dart@0299903f3e78

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