Fix TransitionElementsKindStub to handle non-JSArray objects correctly.

src/mips/lithium-codegen-mips.cc

Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index edbc9b5ed0f911ca44d02fb625d465403881e6f0..7311db6a127da5d04fed5dac8aef783b55e89a1a 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -4382,7 +4382,8 @@ void LCodeGen::DoTransitionElementsKind(LTransitionElementsKind* instr) {
         this, Safepoint::kWithRegistersAndDoubles);
     __ mov(a0, object_reg);
     __ li(a1, Operand(to_map));
-    TransitionElementsKindStub stub(from_kind, to_kind);
+    bool is_js_array = from_map->instance_type() == JS_ARRAY_TYPE;
+    TransitionElementsKindStub stub(from_kind, to_kind, is_js_array);
     __ CallStub(&stub);
     RecordSafepointWithRegistersAndDoubles(
         instr->pointer_map(), 0, Safepoint::kNoLazyDeopt);