Roll src/third_party/dart 5ddd157..75ee523 (19 commits)

75ee523 [VM] Remove flutter/flutter patch for 3head, the issue has been fixed upstream
4013b0e [gardening] Add adjusted fix to flutter test patch.
69d4658 [gardening] Add fix to flutter test patch.
f5d43c4 Include 'linterVersion' into AnalysisOption signature.
e58b7cd [gardening] Fix flutter patch.
22e70ed [gardening] Patch flutter/flutter to fix hhh buildbot
dc2422e [vm, gc] Fix accounting of external sizes in the class table.
bdb52a8 Fix 'Organize Directives' handling end-of-line comments.
371d244 linter version support
435a52e [ VM / Service ] Fixed inconsistencies in service protocol spec.
8ac6114 Sort AvailableDeclaration fields.
48a9eb8 [analyzer] Add hint for unnecessary ?.
ccb2e2d [analyzer] Report dead code for x ?? y where x is non-null
004dd96 Remove mock_type.dart, it looks that it is not used.
266ce73 Remove CompletionSuggestion.elementUri, replaced with AvailableSuggestionSet.
7ebb041 Rework DartFix listener interface to separate edits from suggestions.
1c576b6 Generalize FixCodeTask to handle arbitrary numbers of phases.
fd377a4 Sort file non_nullable_fix.dart
98af688 Sort dartfix_listener.dart

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': '5ddd1578096ee1d5bf04be82818f4801d4719a5e',
+  'dart_revision': '75ee523f9102ecf3cef648979e09b88468c4a53d',
 
   # 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

@@ -1,4 +1,4 @@
-Signature: 5f4a380cb378e7c1d8b1cc1d6742d9a0
+Signature: c3400903d3171173995a2a7eb437b6b0
 
 UNUSED LICENSES: