Roll src/third_party/dart 1573f4e877..fd48ea3432 (16 commits)

dart-lang/sdk@fd48ea3432 [vm/fuzzer] Randomly choose intervals for flags
dart-lang/sdk@a90abd6cf7 Support completions of extensions imported with a prefix
dart-lang/sdk@d548da74c0 Add tests for extension members shadowed in classes.
dart-lang/sdk@d7c944b4c0 [vm/bytecode] Support library dependencies in bytecode for mirrors and vm-service.
dart-lang/sdk@aa0af27497 Support completion of static members defined in extensions
dart-lang/sdk@d1c9a2b06f [vm/compiler] Improve DIV and MOD performance
dart-lang/sdk@c07b1fea98 Add relevanceBoost for initializers of variable initializers.
dart-lang/sdk@c5d108a623 Build new elements for GenericFunctionType in DeclarationResolver.
dart-lang/sdk@a78e0c4af0 generate errors for extensions named w/ built-in ids
dart-lang/sdk@14bff68ca1 Remove another unused import
dart-lang/sdk@fc4919eb6f [vm/ffi] Fix incomplete handling of Ffi types in VisitPointersPredefined.
dart-lang/sdk@792c3aa92d [vm/tfa] Don't drop abstract classes with entry-point annotation.
dart-lang/sdk@9c8646267d [vm/compiler] Get original ICData in FlowGraphCompiler::GenerateStaticCall
dart-lang/sdk@4e4ec6082c [vm/fuzzer] Add '=>' functions
dart-lang/sdk@7835190cc9 Revert: Read default values fully.
dart-lang/sdk@c7f3300448 Flow analysis: begin tracking where variables are written to in closures.

DEPS

@@ -34,7 +34,7 @@ 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': '1573f4e877f351cc8c6fcdc5cae8886cfa3588ca',
+  'dart_revision': 'fd48ea3432aaeec5467b87f5192e9cc56f2b945e',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py

ci/licenses_golden/licenses_third_party

-Signature: 74ac214764fed9d81a4d11cd3c67dacf
+Signature: f52f7c65ec79034b2042cf6fa927074e
 
 UNUSED LICENSES: