Extract LoadAccessor into a masm function.

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 4f7729bee77e8e17abbe1a04347bbb811040f757..643b9b5e77bbd3eb9080eb022219f9ea50747bfc 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -1516,6 +1516,8 @@ const Operand& rt = Operand(zero_reg), BranchDelaySlot bd = PROTECT
   void LoadInstanceDescriptors(Register map, Register descriptors);
   void EnumLength(Register dst, Register map);
   void NumberOfOwnDescriptors(Register dst, Register map);
+  void LoadAccessor(Register dst, Register holder, int accessor_index,
+                    AccessorComponent accessor);
 
   template<typename Field>
   void DecodeField(Register dst, Register src) {