Enables ASAN build and test for Dart

mojo/tools/data/unittests

 # This file contains a list of Mojo gtest unit tests.
 # This must be valid python. It can use the |config| global that will be a
 # mopy.config.Config object and must set a |tests| global that will contain the
 # tests to run.
 # TODO(vtl): Add a way of specifying data dependencies instead of cacheable.
 
 tests = [
   # System tests:
   {
     "test": "mojo_system_unittests",
@@ skipping 62 matching lines @@
     {
       "test": "js_integration_tests",
       "cacheable": False,
     },
     {
       "test": "js_services_unittests",
       "cacheable": False,
     },
   ]
 
-# TODO: get dart unittests working with asan and android.
-if not config.sanitizer and config.target_os != config.OS_ANDROID:
+# TODO: get dart unittests working with android.
+if config.target_os != config.OS_ANDROID:
   tests += [
     {
       "test": "dart_unittests",
       "cacheable": False,
     },
   ]