Mark language_2/deferred_optimized_test as flaky.

Change-Id: Iceb3ed11955fcb1e2cee88bdd87f3ac183857a46
Reviewed-on: https://dart-review.googlesource.com/c/87281
Reviewed-by: Siva Annamalai <asiva@google.com>
diff --git a/tests/language_2/language_2_kernel.status b/tests/language_2/language_2_kernel.status
index 427128f..a2e8d78 100644
--- a/tests/language_2/language_2_kernel.status
+++ b/tests/language_2/language_2_kernel.status
@@ -243,7 +243,7 @@
 vm/regress_27201_test: CompileTimeError # Fasta/KernelVM bug: Deferred loading kernel issue 30273.
 
 [ $arch == ia32 && $compiler == dartk && $system == windows ]
-deferred_optimized_test: Crash
+deferred_optimized_test: Pass, Crash # Issue 35405 (Flaky failure).
 
 [ $builder_tag == obfuscated && $compiler == dartkp ]
 generic_function_dcall_test/01: SkipByDesign # Prints type names