[Mac] Implement base::EnableTerminationOnHeapCorruption() by overriding malloc_error_break().

base/process_util_posix.cc

Index: base/process_util_posix.cc
diff --git a/base/process_util_posix.cc b/base/process_util_posix.cc
index db380bdadfa1704784d6a32e82dff4e2c763fda7..a81acbc68cf5b684be3de18d810aa993417a54de 100644
--- a/base/process_util_posix.cc
+++ b/base/process_util_posix.cc
@@ -656,10 +656,6 @@ bool LaunchProcess(const CommandLine& cmdline,
 
 ProcessMetrics::~ProcessMetrics() { }
 
-void EnableTerminationOnHeapCorruption() {
-  // On POSIX, there nothing to do AFAIK.
-}
-
 bool EnableInProcessStackDumping() {
   // When running in an application, our code typically expects SIGPIPE
   // to be ignored.  Therefore, when testing that same code, it should run