Roll src/third_party/dart 700254996f..da09945643 (14 commits)

da09945643 Update dartfix pubspec before publishing
b81c1b2095 Parse spread collections in map literals
1b0d93366d Add list literal spread collection fasta test cases
6c2ea4936a Clean up several deprecation hints
07f95e7761 Revert "[vm] Enable timeline on Fuchsia even in product mode."
9cdce03e16 [dart2js] Improve null receiver guard removal near JS code
c3599a9d8c Revert "[vm, isolate] Fix length truncation in message snapshots."
95e10c336f Revert "[vm] Assert callback state for all Dart_Set*ReturnValue."
3f7b371f2c [vm] Enable timeline on Fuchsia even in product mode.
4b22195ea1 [vm, isolate] Fix length truncation in message snapshots.
a353b1172a [vm, compiler] Remove TAG_IC_DATA, which has since been subsumed by RebindRule.
ca12afec50 [vm] Assert callback state for all Dart_Set*ReturnValue.
2028006a25 [Observatory] Updated Dart icon to new colour scheme
84273b9f36 Improvements for flow analysis.

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': '700254996fa1fe611e28f88b51f71658926898ce',
+  'dart_revision': 'da099456434a0287523652997d61aeb125a9997a',
 
   # 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: de1d8dce6d25d38fd4f2fd4d0df32898
+Signature: 6bd4e9a9ef92f56a1631a8f701511ac6
 
 UNUSED LICENSES: