Fix redefining of attributes on aliased arguments.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index e2fee0c1d5b7d7ae2178d044cdd4ae686ad18ff7..3a3c8f4695ef43225f30cbf21dcea5a1eac7cdfe 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -641,6 +641,9 @@ class Heap {
   // Allocates an empty TypeFeedbackInfo.
   MUST_USE_RESULT MaybeObject* AllocateTypeFeedbackInfo();
 
+  // Allocates an AliasedArgumentsEntry.
+  MUST_USE_RESULT MaybeObject* AllocateAliasedArgumentsEntry(int slot);
+
   // Clear the Instanceof cache (used when a prototype changes).
   inline void ClearInstanceofCache();