MIPS: Make HCheckPrototypeMaps compatible with parallel recompilation.

src/mips/lithium-mips.h

Index: src/mips/lithium-mips.h
diff --git a/src/mips/lithium-mips.h b/src/mips/lithium-mips.h
index a9116ef8dbf568fe9193c4fe7386f67c2e37a3fe..fb24632baf68a02c501f2b5c69d4df98ec616af7 100644
--- a/src/mips/lithium-mips.h
+++ b/src/mips/lithium-mips.h
@@ -2130,8 +2130,10 @@ class LCheckPrototypeMaps: public LTemplateInstruction<1, 0, 2> {
   DECLARE_CONCRETE_INSTRUCTION(CheckPrototypeMaps, "check-prototype-maps")
   DECLARE_HYDROGEN_ACCESSOR(CheckPrototypeMaps)
 
-  Handle<JSObject> prototype() const { return hydrogen()->prototype(); }
-  Handle<JSObject> holder() const { return hydrogen()->holder(); }
+  ZoneList<Handle<JSObject> >* prototypes() const {
+    return hydrogen()->prototypes();
+  }
+  ZoneList<Handle<Map> >* maps() const { return hydrogen()->maps(); }
 };