Revert of Do not embed constant functions in StoreTransition stub.

src/ic/x87/handler-compiler-x87.cc

Index: src/ic/x87/handler-compiler-x87.cc
diff --git a/src/ic/x87/handler-compiler-x87.cc b/src/ic/x87/handler-compiler-x87.cc
index 00a7e08caf6d91b55cdd591307a5ca832d24d28a..1a2335b8a4bc30243c77a957018b45efce7c64d0 100644
--- a/src/ic/x87/handler-compiler-x87.cc
+++ b/src/ic/x87/handler-compiler-x87.cc
@@ -343,18 +343,10 @@
 }
 
 
-void NamedStoreHandlerCompiler::GenerateConstantCheck(Register map_reg,
-                                                      int descriptor,
+void NamedStoreHandlerCompiler::GenerateConstantCheck(Object* constant,
                                                       Register value_reg,
-                                                      Register scratch,
                                                       Label* miss_label) {
-  DCHECK(!map_reg.is(scratch));
-  DCHECK(!map_reg.is(value_reg));
-  DCHECK(!value_reg.is(scratch));
-  __ LoadInstanceDescriptors(map_reg, scratch);
-  __ mov(scratch,
-         FieldOperand(scratch, DescriptorArray::GetValueOffset(descriptor)));
-  __ cmp(value_reg, scratch);
+  __ CmpObject(value_reg, handle(constant, isolate()));
   __ j(not_equal, miss_label);
 }