MIPS: Disinherit PropertyCell from Cell.

src/mips64/lithium-codegen-mips64.cc

Index: src/mips64/lithium-codegen-mips64.cc
diff --git a/src/mips64/lithium-codegen-mips64.cc b/src/mips64/lithium-codegen-mips64.cc
index 114933f0ad38b2bd7393f316d82d27ccdf3e3103..f6a5d005b17b25d89b68cac82d8ad5c77d332ab2 100644
--- a/src/mips64/lithium-codegen-mips64.cc
+++ b/src/mips64/lithium-codegen-mips64.cc
@@ -2738,8 +2738,8 @@ 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)));
-  __ ld(at, FieldMemOperand(at, PropertyCell::kValueOffset));
+  __ li(at, Operand(cell));
+  __ ld(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
@@ -5285,7 +5285,7 @@ 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));
     __ ld(at, FieldMemOperand(at, Cell::kValueOffset));
     DeoptimizeIf(ne, instr, Deoptimizer::kValueMismatch, reg, Operand(at));
   } else {