The Array function must be looked up in the native context.

src/mips/macro-assembler-mips.h

Index: src/mips/macro-assembler-mips.h
diff --git a/src/mips/macro-assembler-mips.h b/src/mips/macro-assembler-mips.h
index 45bfcb38d28adc5125a9c908bbdeb256953c5709..1b64f25689d3c8d1d220bf38d1bbc5105ac9f79f 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -872,7 +872,6 @@ class MacroAssembler: public Assembler {
       Label* no_map_match);
 
   void LoadGlobalFunction(int index, Register function);
-  void LoadArrayFunction(Register function);
 
   // Load the initial map from the global function. The registers
   // function and map can be the same, function is then overwritten.