Merged r20375 into 3.24 branch.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index 266cdb9684babcb887958522b7a5596aa181ff82..52f8d133dfabeb360c37df6246625f6b722b4944 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -356,7 +356,9 @@ namespace internal {
   V(next_string, "next")                                                 \
   V(byte_length_string, "byteLength")                                    \
   V(byte_offset_string, "byteOffset")                                    \
-  V(buffer_string, "buffer")
+  V(buffer_string, "buffer")                                             \
+  V(intl_initialized_marker_string, "v8::intl_initialized_marker")       \
+  V(intl_impl_object_string, "v8::intl_object")
 
 // Forward declarations.
 class GCTracer;