Use weak cell in monomorphic KeyedStore IC.

src/ia32/macro-assembler-ia32.cc

Index: src/ia32/macro-assembler-ia32.cc
diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc
index 41ac21315012377706d317e9258401a03ccfaaa3..38259d7651443aedf41b91042855635fda94ad2a 100644
--- a/src/ia32/macro-assembler-ia32.cc
+++ b/src/ia32/macro-assembler-ia32.cc
@@ -740,16 +740,16 @@ void MacroAssembler::CheckMap(Register obj,
 }
 
 
-void MacroAssembler::DispatchMap(Register obj,
-                                 Register unused,
-                                 Handle<Map> map,
-                                 Handle<Code> success,
-                                 SmiCheckType smi_check_type) {
+void MacroAssembler::DispatchWeakMap(Register obj, Register scratch1,
+                                     Register scratch2, Handle<WeakCell> cell,
+                                     Handle<Code> success,
+                                     SmiCheckType smi_check_type) {
   Label fail;
   if (smi_check_type == DO_SMI_CHECK) {
     JumpIfSmi(obj, &fail);
   }
-  cmp(FieldOperand(obj, HeapObject::kMapOffset), Immediate(map));
+  mov(scratch1, FieldOperand(obj, HeapObject::kMapOffset));
+  CmpWeakValue(scratch1, cell, scratch2);
   j(equal, success);
 
   bind(&fail);