MIPS: Disinherit PropertyCell from Cell.

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 6673a866456303739b59d2730215580edfd0ce07..0b4bd2d77b8f2d26577449f2642f8bfbaadc2b9a 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -2761,8 +2761,8 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
   // root array to force relocation to be able to later patch with
   // the cached map.
   Handle<Cell> cell = factory()->NewCell(factory()->the_hole_value());
-  __ li(at, Operand(Handle<Object>(cell)));
-  __ lw(at, FieldMemOperand(at, PropertyCell::kValueOffset));
+  __ li(at, Operand(cell));
+  __ lw(at, FieldMemOperand(at, Cell::kValueOffset));
   __ BranchShort(&cache_miss, ne, map, Operand(at));
   // We use Factory::the_hole_value() on purpose instead of loading from the
   // root array to force relocation to be able to later patch
@@ -5249,7 +5249,7 @@ void LCodeGen::DoCheckValue(LCheckValue* instr) {
   if (isolate()->heap()->InNewSpace(*object)) {
     Register reg = ToRegister(instr->value());
     Handle<Cell> cell = isolate()->factory()->NewCell(object);
-    __ li(at, Operand(Handle<Object>(cell)));
+    __ li(at, Operand(cell));
     __ lw(at, FieldMemOperand(at, Cell::kValueOffset));
     DeoptimizeIf(ne, instr, Deoptimizer::kValueMismatch, reg, Operand(at));
   } else {