Make CallocDiesOnOOM return false under TSan and ASan. Their allocators return NULL in the case of …

base/security_unittest.cc

Index: base/security_unittest.cc
===================================================================
--- base/security_unittest.cc	(revision 189999)
+++ base/security_unittest.cc	(working copy)
@@ -66,7 +66,12 @@
 bool CallocDiesOnOOM() {
 // The wrapper function in base/process_util_linux.cc that is used when we
 // compile without TCMalloc will just die on OOM instead of returning NULL.
-#if defined(OS_LINUX) && defined(NO_TCMALLOC)
+// This function is explicitly disabled if we compile with AddressSanitizer,
+// MemorySanitizer or ThreadSanitizer.
+#if defined(OS_LINUX) && defined(NO_TCMALLOC) && \
+    (!defined(ADDRESS_SANITIZER) && \
+     !defined(MEMORY_SANITIZER) && \
+     !defined(THREAD_SANITIZER))
   return true;
 #else
   return false;