cros-asan: Fix another crash in chromeos asan bots.
This time, add __asan_unpoison_memory_region in the asan_stub.
BUG=none
TBR=yunlian,sky
Review URL: https://codereview.chromium.org/141273013
git-svn-id: http://src.chromium.org/svn/trunk/src/chrome/test/pyautolib@245794 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
diff --git a/asan_stub.c b/asan_stub.c
index 9bbd9d1..810a7eb 100644
--- a/asan_stub.c
+++ b/asan_stub.c
@@ -111,6 +111,7 @@
void __asan_after_dynamic_init() { }
int __asan_option_detect_stack_use_after_return;
typedef unsigned long long uptr;
+void __asan_poison_memory_region(void const volatile *addr, uptr size) { }
void __asan_unpoison_memory_region(void const volatile *addr, uptr size) { }
uptr __asan_stack_malloc_1(uptr size, uptr real_stack) {}
uptr __asan_stack_malloc_2(uptr size, uptr real_stack) {}
