Roll src/third_party/dart e70273c306..9a07ad88f4 (5 commits)

9a07ad88f4 [vm, irregexp] Cache the backtracking stack on the isolate to avoid memory leaks in jemalloc.
7cd43a1de3 bump to linter 0.1.87
6114435ea5 Add support for recording context information with analysis errors, with one example
6498a3e357 Add some tests of the listTokenDetails request
74ac17c13f In BestPracticesVerifier, configure linter context with unit information.

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': 'e70273c306934d62b2f8d4c469980b2a83cca5a6',
+  'dart_revision': '9a07ad88f494ca81030172c07b47d54a0f46f822',
 
   # WARNING: DO NOT EDIT MANUALLY
   # The lines between blank lines above and below are generated by a script. See create_updated_flutter_deps.py
@@ -60,7 +60,7 @@ vars = {
   'dart_http_throttle_tag': '1.0.2',
   'dart_intl_tag': '0.15.7',
   'dart_json_rpc_2_tag': '2.0.9',
-  'dart_linter_tag': '0.1.86',
+  'dart_linter_tag': '0.1.87',
   'dart_logging_tag': '0.11.3+2',
   'dart_markdown_tag': '2.0.3',
   'dart_matcher_tag': '0.12.3',

ci/licenses_golden/licenses_third_party

-Signature: 32d00d2dd3c55c73cf4be4d65181c95b
+Signature: 93711c49172a51c38a92f872300401ad
 
 UNUSED LICENSES: