Merge V8 5.3.332.45.  DO NOT MERGE

Test: Manual

FPIIM-449

Change-Id: Id3254828b068abdea3cb10442e0172a8c9a98e03
(cherry picked from commit 13e2dadd00298019ed862f2b2fc5068bba730bcf)
diff --git a/src/extensions/statistics-extension.cc b/src/extensions/statistics-extension.cc
index e6649a6..387bd31 100644
--- a/src/extensions/statistics-extension.cc
+++ b/src/extensions/statistics-extension.cc
@@ -135,8 +135,7 @@
     AddNumber(args.GetIsolate(), result, numbers[i].number, numbers[i].name);
   }
 
-  AddNumber64(args.GetIsolate(), result,
-              heap->amount_of_external_allocated_memory(),
+  AddNumber64(args.GetIsolate(), result, heap->external_memory(),
               "amount_of_external_allocated_memory");
   args.GetReturnValue().Set(result);
 }