Revert "Roll Dart to fe606f890b0a311da802c78b0af414a3c2087a79" (flutter/engine#5023)

This reverts commit 2983a1b6130a10aadb0f64a6ff411890a794c92f.

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': 'fe606f890b0a311da802c78b0af414a3c2087a79',
+  'dart_revision': 'f76dad0adcf6766d73351354da653d6a793b5abc',
 
   'dart_args_tag': '1.4.1',
   'dart_async_tag': '2.0.6',
@@ -58,6 +58,7 @@ vars = {
   'dart_http_tag': '0.11.3+16',
   'dart_http_throttle_tag': '1.0.1',
   'dart_intl_tag': '0.15.2',
+  'dart_isolate_tag': '1.1.0',
   'dart_json_rpc_2_tag': '2.0.6',
   'dart_linter_tag': '0.1.47',
   'dart_logging_tag': '0.11.3+1',
@@ -75,7 +76,7 @@ vars = {
   'dart_pool_tag': '1.3.4',
   'dart_protobuf_tag': '0.7.1',
   'dart_pub_rev': '4947e0b3cb3ec77e4e8fe0d3141ce4dc60f43256',
-  'dart_pub_semver_tag': '1.3.7',
+  'dart_pub_semver_tag': '1.3.6',
   'dart_quiver_tag': '5aaa3f58c48608af5b027444d561270b53f15dbf',
   'dart_resource_rev': 'af5a5bf65511943398146cf146e466e5f0b95cb9',
   'dart_root_certificates_rev': '16ef64be64c7dfdff2b9f4b910726e635ccc519e',
@@ -114,7 +115,7 @@ allowed_hosts = [
 ]
 
 deps = {
-  'src': 'https://github.com/flutter/buildroot.git' + '@' + '66676c9960264c96d1b424264a5966f8e2b40153',
+  'src': 'https://github.com/flutter/buildroot.git' + '@' + '3cf97e01cdbd4bb920fa3d40282a56c4b2d62a58',
 
    # Fuchsia compatibility
    #
@@ -208,6 +209,9 @@ deps = {
   'src/third_party/dart/third_party/pkg/dartdoc':
    Var('dart_git') + '/dartdoc.git' + '@' + Var('dart_dartdoc_tag'),
 
+  'src/third_party/dart/third_party/pkg/isolate':
+   Var('dart_git') + '/isolate.git' + '@' + Var('dart_isolate_tag'),
+
   'src/third_party/dart/third_party/pkg/json_rpc_2':
    Var('dart_git') + '/json_rpc_2.git' + '@' + Var('dart_json_rpc_2_tag'),
 

engine/src/flutter/flutter_kernel_transformers/pubspec.yaml

@@ -68,6 +68,8 @@ dependency_overrides:
     path: ../../third_party/dart/third_party/pkg/http_multi_server
   http_parser:
     path: ../../third_party/dart/third_party/pkg/http_parser
+  isolate:
+    path: ../../third_party/dart/third_party/pkg/isolate
   matcher:
     path: ../../third_party/dart/third_party/pkg/matcher
   mime:

engine/src/flutter/frontend_server/pubspec.yaml

@@ -35,6 +35,7 @@ dev_dependencies:
   http: any
   http_multi_server: any
   http_parser: any
+  isolate: any
   matcher: any
   mime: any
   mockito: any
@@ -116,6 +117,8 @@ dependency_overrides:
     path: ../../third_party/dart/third_party/pkg/http_multi_server
   http_parser:
     path: ../../third_party/dart/third_party/pkg/http_parser
+  isolate:
+    path: ../../third_party/dart/third_party/pkg/isolate
   matcher:
     path: ../../third_party/dart/third_party/pkg/matcher
   mime:

engine/src/flutter/tools/licenses/pubspec.lock

@@ -58,4 +58,4 @@ packages:
     source: hosted
     version: "1.1.5"
 sdks:
-  dart: ">=1.21.0 <=2.0.0-dev.47.0"
+  dart: ">=1.21.0 <=2.0.0-edge.af1436931b93e755d38223c487d33a0a1f5eadf5"