Roll src/third_party/dart cc3e22f..48e93d3 (8 commits)

dart-lang/sdk@48e93d3d3b [vm, linux] Try to attach names to all VirtualMemory allocations using memfd.
dart-lang/sdk@f72445a6fc [vm,aot,bytecode] Fix type arguments offset in simarm-x64
dart-lang/sdk@71ecb73a2b [vm] Fix one MSAN failure; add UBSAN configuration.
dart-lang/sdk@50d972bba0 Build DDC targets with forked SDK sources when building with --nnbd flag
dart-lang/sdk@795949de00 fix loopVariable null access
dart-lang/sdk@62ee78eeec [vm,bytecode] Generate calls for causal-async-stacks more consistently
dart-lang/sdk@f4f0831c69 [vm] Fix TSAN failures related to object headers and GC task phases.
dart-lang/sdk@164e11b542 Prepare to publish analyzer_plugin version 0.2.1.

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': 'cc3e22f724105863b0b62b002340533f5e17853f',
+  'dart_revision': '48e93d3d3b38ec87a02a7f8743eae08aaa597965',
 
   # 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: 2125aecbe76fef1f96294e91d4dac051
+Signature: 500cc19ee17ba4703537a9ae9ac78b8f
 
 UNUSED LICENSES:
 
@@ -7475,6 +7475,7 @@ FILE: ../../../third_party/dart/runtime/llvm_codegen/codegen/main.cc
 FILE: ../../../third_party/dart/runtime/observatory/lib/src/elements/tree_map.dart
 FILE: ../../../third_party/dart/runtime/observatory/lib/src/repositories/timeline_base.dart
 FILE: ../../../third_party/dart/runtime/platform/elf.h
+FILE: ../../../third_party/dart/runtime/platform/thread_sanitizer.h
 FILE: ../../../third_party/dart/runtime/tools/dartfuzz/dartfuzz_api_table.dart
 FILE: ../../../third_party/dart/runtime/tools/dartfuzz/dartfuzz_ffi_api.dart
 FILE: ../../../third_party/dart/runtime/tools/dartfuzz/dartfuzz_type_table.dart