Roll src/third_party/dart f7bf890ff7..ef0c812b0d (13 commits)

ef0c812b0d Add support for loading a modular test folder and specifying deps in yaml
51fe641e82 Create a SynchronousSession class.
520ba89658 [vm] Remove IsolateSpawnState::package_root
7e58fb155a Sort declarations in fix_lint_task.dart
ab84e36989 [dartfix] refactor the dartfix cli UI a bit
ce2bbd4108 [dartfix] refactor dartfix pubspec.yaml
a91cc6c701 [observatory] Remove use of custom elements.
d0f9c9c1a7 [vm/compiler/bytecode] Infer receiver type in bytecode functions
e9bec21d13 [vm/bytecode] Cleanup after switching to compact bytecode instructions
68de477535 [vm/bytecode] Compact encoding of bytecode instructions (part 3/3)
6fe73e4544 [vm/bytecode] Support compact bytecode instructions in VM (part 2/3)
1cc4003e5a [vm/interpreter] Support misaligned bytecodes (compact bytecodes 1/3)
a31594b9af [dartdevc] Cleanup ddb script

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': 'f7bf890ff77046576c1c3ca5f5414ca17a0590f7',
+  'dart_revision': 'ef0c812b0de13a7e89b10bd31d7ac3c9d070821a',
 
   # 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: caaa59fbed3763bce6b9d60c6ec90a43
+Signature: 4657e6155b72d88ebfbd369624c10ad4
 
 UNUSED LICENSES:
 
@@ -5181,6 +5181,7 @@ FILE: ../../../third_party/dart/runtime/vm/constants_arm.cc
 FILE: ../../../third_party/dart/runtime/vm/constants_arm64.cc
 FILE: ../../../third_party/dart/runtime/vm/constants_dbc.cc
 FILE: ../../../third_party/dart/runtime/vm/constants_ia32.cc
+FILE: ../../../third_party/dart/runtime/vm/constants_kbc.cc
 FILE: ../../../third_party/dart/runtime/vm/constants_x64.cc
 FILE: ../../../third_party/dart/runtime/vm/frame_layout.h
 FILE: ../../../third_party/dart/runtime/vm/intrusive_dlist.h