Roll src/third_party/dart d0f92e8cc5..d927333c52 (6 commits)

d927333c52 Add all SDK libraries, and context files belonging to the package / potions of it.
f92b816268 Add 'Convert to multiline string' quick assist.
c5cfdc5279 Expose data member 'port' for MessageEvents and automatically pull in markupsafe for go.sh script.
6699384ddd Issue 34437. Restore checking that optional parameters in derived classes should have the same default values as overridden.
df34f65d90 Restore TLABs.
ece54f3c43 [dart2js] Don't inline direct recursion

DEPS

@@ -31,7 +31,7 @@ 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': 'd0f92e8cc50efcca9cf47e18fc49e35d4c69564b',
+  'dart_revision': 'd927333c52acdc03599ea9317e35153277714ac0',
 
   # 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: 3afdd00b81bda68b861cde232818ef5e
+Signature: f8265c6642639361478b6d5eb536250d
 
 UNUSED LICENSES: