Correct handling of arrays with callbacks in the prototype chain.

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
diff --git a/src/x64/macro-assembler-x64.h b/src/x64/macro-assembler-x64.h
index 24374349a25b8a9b7abdba65777c20a5b485cf3f..c0b6afabbece5087102b2a94cee94b3bab23862a 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-x64.h
@@ -1412,6 +1412,10 @@ class MacroAssembler: public Assembler {
     bind(&no_memento_found);
   }
 
+  // Jumps to found label if a prototype map has dictionary elements.
+  void JumpIfDictionaryInPrototypeChain(Register object, Register scratch0,
+                                        Register scratch1, Label* found);
+
  private:
   // Order general registers are pushed by Pushad.
   // rax, rcx, rdx, rbx, rsi, rdi, r8, r9, r11, r14, r15.