Oilpan: Disable the GC_PLUGIN_IGNORE annotation when compiling with asan.

Source/heap/Heap.h

Index: Source/heap/Heap.h
diff --git a/Source/heap/Heap.h b/Source/heap/Heap.h
index 5904f48118862b05c1ee4c1a71afef1eb368dbe4..75821fbe7c821025369c566ada3d1a3db206efe8 100644
--- a/Source/heap/Heap.h
+++ b/Source/heap/Heap.h
@@ -1046,10 +1046,10 @@ T* adoptRefCountedGarbageCollected(T* ptr)
 // ignore a particular class or field when checking for proper usage. When using
 // GC_PLUGIN_IGNORE a bug-number should be provided as an argument where the
 // bug describes what needs to happen to remove the GC_PLUGIN_IGNORE again.
-#if COMPILER(CLANG)
-#define STACK_ALLOCATED()                               \
-    private:                                            \
-        __attribute__((annotate("blink_stack_allocated")))    \
+#if COMPILER(CLANG) && !defined(ADDRESS_SANITIZER)
+#define STACK_ALLOCATED()                                  \
+    private:                                               \
+        __attribute__((annotate("blink_stack_allocated"))) \
         void* operator new(size_t) = delete;
 #define GC_PLUGIN_IGNORE(bug)                           \
     __attribute__((annotate("blink_gc_plugin_ignore")))