Roll Dart SDK from 06536d6 to e256855 (6 revisions) (flutter#21775)

Author: zanderso

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': '06536d68ca0f27528b0bf729f4b8d673ed14beda',
+  'dart_revision': 'e256855d07ba9cad5048f012f38a05446ca2fe09',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -193,7 +193,7 @@ deps = {
    Var('dart_git') + '/dart2js_info.git@0632a623b08e1f601c7eba99e0186a581ae799e9',
 
   'src/third_party/dart/third_party/pkg/dartdoc':
-   Var('dart_git') + '/dartdoc.git@v0.35.0',
+   Var('dart_git') + '/dartdoc.git@8f5f30e58bbc0f11f104888ee87f11cbd6b82cc7',
 
   'src/third_party/dart/third_party/pkg/ffi':
    Var('dart_git') + '/ffi.git@454ab0f9ea6bd06942a983238d8a6818b1357edb',
@@ -349,7 +349,7 @@ deps = {
    Var('dart_git') + '/package_config.git@9c586d04bd26fef01215fd10e7ab96a3050cfa64',
 
   'src/third_party/dart/tools/sdks':
-   {'packages': [{'version': 'version:2.10.0-110.3.beta', 'package': 'dart/dart-sdk/${{platform}}'}], 'dep_type': 'cipd'},
+   {'packages': [{'version': 'version:2.11.0-190.0.dev', 'package': 'dart/dart-sdk/${{platform}}'}], 'dep_type': 'cipd'},
 
   # WARNING: end of dart dependencies list that is cleaned up automatically - see create_updated_flutter_deps.py.
 

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: e1e238bf83ff046e90191a5521ba595f
+Signature: 4f38a8a9ed9b09a6bd9f88ed98a9fe08
 
 UNUSED LICENSES: