Non-SFI mode: Implement test launcher for nacl_helper_nonsfi_unittests

components/nacl/loader/nonsfi/nonsfi_sandbox_unittest.cc

Index: components/nacl/loader/nonsfi/nonsfi_sandbox_unittest.cc
diff --git a/components/nacl/loader/nonsfi/nonsfi_sandbox_unittest.cc b/components/nacl/loader/nonsfi/nonsfi_sandbox_unittest.cc
index acfc1270149ddfed5852ff2c3d4119da12f83c27..4338fb6fe295555f5f63aa4014aa9b78124f87bc 100644
--- a/components/nacl/loader/nonsfi/nonsfi_sandbox_unittest.cc
+++ b/components/nacl/loader/nonsfi/nonsfi_sandbox_unittest.cc
@@ -488,14 +488,6 @@ BPF_DEATH_TEST_C(NaClNonSfiSandboxTest,
 BPF_TEST_C(NaClNonSfiSandboxTest,
            StartingAndJoiningThreadWorks,
            nacl::nonsfi::NaClNonSfiBPFSandboxPolicy) {
-#if defined(OS_NACL_NONSFI)
-  // base::Thread internally uses LazyInstance, which registers a callback to
-  // AtExitManager. However, in PNaCl toolchain build, it is not instantiated
-  // by the test runner, unlike host toolchain build (nacl_loader_unittests).
-  // Hence, declare it here so that the LazyInstance will work properly.
-  base::AtExitManager at_exit;
-#endif
-
   base::Thread thread("sandbox_tests");
   BPF_ASSERT(thread.Start());
   // |thread|'s destructor will join the thread.