Annotate ThreadData::PushToHeadOfList for MemorySanitizer.

base/compiler_specific.h

Index: base/compiler_specific.h
diff --git a/base/compiler_specific.h b/base/compiler_specific.h
index 5d7d9d11019bd22bc0a9c9e28f06ccb036566a5e..7a3d9f44b7dd219270e132867e87fdb2006ed1d2 100644
--- a/base/compiler_specific.h
+++ b/base/compiler_specific.h
@@ -166,4 +166,14 @@
 // If available, it would look like:
 //   __attribute__((format(wprintf, format_param, dots_param)))
 
+#ifdef MEMORY_SANITIZER

[Alexander Potapenko, 2013/03/20 11:19:43]

Please add comments describing what shall into this section of the header, what
is shadow, and what are the methods below used for.

+extern "C" {
+  void __msan_unpoison(const void *p, unsigned long s);
+  void __msan_print_shadow(const void *p, unsigned long s);
+}
+#else // MEMORY_SANITIZER
+#define __msan_unpoison(p, s)
+#define __msan_print_shadow(p, s)
+#endif // MEMORY_SANITIZER
+
 #endif  // BASE_COMPILER_SPECIFIC_H_