Re-enable SecurityTest.NewOverflow on Mac.

base/security_unittest.cc

Index: base/security_unittest.cc
diff --git a/base/security_unittest.cc b/base/security_unittest.cc
index 39ccdf5817734d0f3a4238b6927787f3db3bb638..c42a07a7da4969a8015e9811db52de855e9b211a 100644
--- a/base/security_unittest.cc
+++ b/base/security_unittest.cc
@@ -87,7 +87,7 @@ void OverflowTestsSoftExpectTrue(bool overflow_detected) {
   }
 }
 
-#if defined(OS_IOS) || defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)
+#if defined(OS_IOS) || defined(OS_WIN) || defined(OS_LINUX)
 #define MAYBE_NewOverflow DISABLED_NewOverflow
 #else
 #define MAYBE_NewOverflow NewOverflow
@@ -95,7 +95,6 @@ void OverflowTestsSoftExpectTrue(bool overflow_detected) {
 // Test array[TooBig][X] and array[X][TooBig] allocations for int overflows.
 // IOS doesn't honor nothrow, so disable the test there.
 // Crashes on Windows Dbg builds, disable there as well.
-// Fails on Mac 10.8 http://crbug.com/227092
 // Disabled on Linux because failing Linux Valgrind bot, and Valgrind exclusions
 // are not currently read. See http://crbug.com/582398
 TEST(SecurityTest, MAYBE_NewOverflow) {